Hau is described as a big-hearted boy who quickly befriends the player once they move to the Alolaregion. He is the grandson of Hala, who is the Kahuna of Melemele Island; and his favorite food is malasada, a famous treat in Alola. One of the villagers in Iki Town, where they live, comments that as a boy, Hau had once witnessed Hala in a rage, which frightened him to the point of tears. Nothing Hala did could comfort him, which he claims is the reason why Hala is "too soft" on Hau.
Once the player has chosen a starter Pokémon, Hau will challenge the player using the starter Pokemon weak to the player's choice. Upon losing, he quickly shrugs off his defeat as he says that he is having fun. He also embarks on the island challenge at the same time as the player, and completes the challenges at around the same pace, until at the most Sophocles's trial. Hau's happy-go-lucky attitude affects most of his early battles as he didn't mind losing, something that irritates Gladion after their first battle.
Hau joins the player on a tour of Aether Paradise after finishing their Akala Island trials. He is shocked to hear from Lusamine that she is over forty years old, and also comments that she looks like Lillie without knowing of their connection.
When the Aether House is raided by Team Skull, Hau manages to win a battle against a Team Skull Grunt, but says that battles he can't afford to lose aren't any fun. Before the player returns from Po Town, Hau loses a critical battle against Team Skull Admin Plumeria when she and her grunts kidnaps Lillie, and is left depressed and in doubt of his own skills because of this.
Hau joins the player and Gladion in their attempt to rescue Lillie and her Cosmog from the Aether Foundation. He is constantly irritated by Gladion's orders and lack of explaining, but manages to take down several Aether Foundation Employee with him and the player before reaching Lillie. He is surprised when Lusamine reveals that Lillie and Gladion were her children. When Lusamine attempts to open up the Ultra Beasts wormholes, Gladion orders Hau to keep Guzma busy while he deals with the recently-arrived Nihilego, but Lusamine and Guzma manage to achieve their objective and escape.
When the player is about to travel to Poni Island, Hau expresses his intention to hold back the island challenge and train himself with Hala instead, finding himself not sufficiently strong enough yet. When the player is about to enter the Pokémon League building, Hau catches up to them and challenges the player to another battle. Upon losing, Hau reaffirms his determination to get stronger, and spurs the player on for his Pokémon League challenge. The day after the player becomes the Champion, Lillie departs for Kanto without having been able to say it to the player and Hau, who is devastated by this and is left in tears after Lillie's ship has left.
During the post-game, Hau appears at the player's house to give them the Z-Crystals to the starter Pokémon they didn't choose at the start of the game, saying that he got them as rewards after having finally had a serious battle with his grandfather. After asking the player and their mom about Kanto, he decides to train hard to one day travel there to find both Lillie and his father, who is a strong Trainer who had hated being the son of a kahuna and thus had moved out of Alola. Afterwards, Hau can be found at Iki Town, training a pair of reformed Team Skull Grunts in Alolan sumo.
Hau is one of the possible NPCs who can challenge the player for the title of Champion, implying that he has completed all his island trials. He will always be the first challenger to appear after the player has defeated the Elite Four for the second time.
After the player has obtained their starter Pokémon from Professor Kukui on Route 1, Hau will appear and choose his own starter from the remaining two (which is always the one weak to the player's choice) before challenging the player into their first Trainer battle. When his grandfather shows up late in Iki Town, Hau berates him for his lateness. After the player has defeated Hala, instead of boarding Kukui's boat, Hau will invite the player to ride Mantine to Akala Island.
On Ula'ula Island, Hau will give the player a Lycanium Z after battling them after their arrival on the island. After the player defeats Guzma at Malie Garden, he notices Hau and tells him that they shouldn't take the island challenge just because he's a kahuna's grandson. After the Aether Paradise incident, Hau realizes that he keeps failing to protect those he cares about, and becomes even more determined to become stronger.
When Necrozma fuses with Nebby during the game's climax and Ultra Beasts start appearing around Alola, Hau and Hala are seen coming face to face with a BlacephalonUS/StakatakaUM at Mahalo Trail. Hala chooses to entrust the battle to his grandson, who is soon joined in the battle by Tapu Koko. After the Necrozma crisis is over and the player starts taking on Mina's trial, the player encounters Hau at Hau'oli Cemetery, also taking on Mina's trial. He then tells the player that they should have a serious battle once they're both done with their island challenge. Later during Mina's trial, he also shows up outside the Aether House, encountering the player and Guzma there. He encourages Guzma to become something no one's ever been before, before giving the player one last warning of their upcoming serious battle. After the player has cleared Mina's trial, Hala will show up and reveal that he and Hau had finally had an all-out battle, in which Hau had managed to defeat his grandfather.
After the player has defeated the Elite Four, instead of Professor Kukui challenging them to test the player's worthiness, Hau will appear to face the player as their final challenger at the Pokémon League to determine the Alola region's first Champion. He also once again appears in the Title Defense battles, now being the strongest possible challenger.
During the post-game, Hau will accompany the player to Poni Grove to help the Ultra Recon Squad deal with a group of BlacephalonUS/StakatakaUM that have appeared there. Regardless of how the player fares against the Ultra Beasts, Hau eventually manages to catch one, giving it to the Ultra Recon Squad for research purposes.
After the Ultra Beast incident at Poni Grove has been solved, Hau can be found at Iki Town, going through the memories of his island challenge with his starter. The Z-Crystals he gave to the player in Sun and Moon are now obtained from Hala instead.
Pokémon
Hau's team slightly differs based on the player's Starter Pokémon choice. He chooses the Alolan starter that is weak to the player's starter. Hau's Eevee evolves into the Eeveelution of the type the player's starter is weak to.
"There's nothing to be scared of as long as we've got Pokémon by our side, eh? Sun, your Pokémon’s called Greninja, right? That's so cool! Follow me! I'll show you where the Pokémon Center is. I wanna heal up my Pokémon, too!"
Upon approaching the Pokémon Center
"Sun! The Pokémon Center's over here!"
Hau'oli City Pokémon Center
"If you talk to the woman at the counter, she can restore your Pokémon to perfect health. Or you can use Potions to heal your Pokémon. Oh, that reminds me, Sun! Here, you can have one of my Super Potions!"
"All right, where should we go next?"
Hau'oli City Shopping District
After visiting the Pokémon Center
"Hi, Professor Kukui! This is Sun! He moved here from the Kanto region—all the way across the ocean!"
"The kahunas sure are something, eh? Able to calm a raging Pokémon without even needing to battle... Now that's something! I mean, I like Tauros plenty and all... but it is pretty scary! I don't want to ride on it!"
"So where are you two off to now?"
"Nice idea! You're always on top of things, Lillie! <Player> just got here to Alola, huh? Then let me tag along, too! I wanna go get something good to eat!"
"Then what're we waiting for! This way! Come on!"
Hau'oli City Beachfront
"Beach time! Yeaaahhh!"
Hau'oli City Shopping District
"He-e-ey! <Player>! I thought I recognized the sound of those feet!"
"So what do you think? Hau'oli is something, eh? Alola's gotta be the best place ever to live!"
"Oh yeah!"
"Hey, <player>. Come in here with me. I've got a good idea of something you could do!"
"Hey, miss. Is it true that you can get some kinda special gift if you have a Rotom Dex?"
"Awesome!"
"Isn't that awesome, <player>? You got a Poké Finder!"
"So, like, what's a Poké Finder?"
"Man, that Rotom Dex is cool! It's like a whole nother partner, <player>! I mean, on top of your Pokémon partner!"
"Oh, but I guess since it's Rotom inside... it pretty much is a Pokémon partner? Either way, you're pretty darn lucky. Meet you outside when you're done in here!"
"We got his/her Rotom Dex upgraded! Now it can take pictures, too!"
"Ahahaha! What was that for, Rotom? Go and put that little trickster back in your Bag, <player>, and follow me! Enough feasting for the eyes... It's time we take care of our stomachs!"
"Howzit, <player>! If you're looking for good eats, you've found 'em!"
"Plus malasada make your Pokémon like you. And affectionate Pokémon are better in battle!"
"Who could resist giving their Pokémon a few malasada, eh? They're just so cute!"
"Now that I've got some fuel in me, I wanna go right down to the Marina and scream out loud... "Watch me, Tutu!" No... "Watch me, world! I'm gonna beat even my old gramps someday!""
"You aren't even allowed to go into it unless you're on your island challenge."
"Oh yeah! Almost forgot! I have something pretty amazing to share with you, <player>. You lucky thing!"
"Revives are solid items to have! If your Pokémon faints in battle and can't go on, then a Revive will perk 'em right back up! But you probably won't find Revives here. Didja know that Poké Marts sometimes sell different things? And not just that! The two clerks at the counter even sell different things from one another!"
"I think I'll get myself a treat at the café to pump myself up before trying the first trial!"
"He-e-ey, <player>! Oh! And Lillie's with you, too!"
"Just finished up my trial! Heh!"
"Hey, <player>! I wanna see if I really learned anything from my trial. Let me battle you again!"
Upon being defeated
"Aww, man! I wanted to show off my Pokémon's best side more!"
After being defeated
"So you and me both beat that Totem Pokémon, huh, <player>? Looks like we're getting pretty strong! But I wonder if I'll ever really be able to beat my gramps at this rate..."
"Heh heh, right..."
"It's all a part of the trials, yeah? After you clear one island's trials, you gotta battle that island's kahuna!"
"I don't know about fierce..."
Hau'oli City Beachfront
After speaking to Mom
"Hey! <Player>!"
"I just told my mom that I'm going to Akala Island next! Then she slapped me on the back so hard I'm still feelin' it and sent me on my way!"
"Do you think the boat's ready? It's the professor's own boat, right? Let's go to the Marina and check it out!"
Hau'oli City Marina
"Hey, Prof, are you sure this old thing's really seaworthy?"
"We-e-e are off! Come on, grandma! Kick it up a notch!"
"Ha ha ha! You're probably just worried about your silly hat flying off! I wonder what kind of island Akala is, huh? Seeing all of Alola for myself is half the fun of doing the island challenge! Isn't this just the best, <player>?!"
"Hey! <Player>! Glad I ran into you... So we can see who's stronger now! My gramps must've thought I did good enough in my grand trial, 'cause he gave me a Z-Ring, too!"
"Having a battle in a place like Paniola Town feels like we're in a real old-fashioned Western showdown or something, right? This is so cool! Though if we're real honorable cowboys, we've gotta make sure our teams are healthy first."
Before battle
"Awright, Pikachu and team! Let's show this newbie what Alola's got!"
Upon being defeated
"Nice! How'd you come up with that kind of battle plan? You gotta tell me!"
After being defeated
"Ma-a-an, that was some kinda battle! Our Pokémon all look like they had a blast, too!"
"Right then. Here. I'll share my bit of good luck with you, <player>."
"You know how the Totem Pokémon are all, like, surrounded by some aura of power? If you use a Dire Hit on your Pokémon and manage to land a critical hit, that aura won't mean a thing!"
"You know, Pokémon battles are just, like, sometimes you win, sometimes you lose. But you're only really a loser if you don't have any fun while you're at it. Right? Anyway, I'm heading off to Paniola Ranch!"
"You know my gramps? Wait. So you think I'm strong?"
"Thanks, <player>. And <first Pokémon in party>, too. It was a good battle!"
"Phew... Looks like I've gotta train up my team if I'm gonna take on the trial at Brooklet Hill next! Here, <player>, take these with you. We're gonna beat this island challenge!"
"Dude! It's the Masked Royal! I wanna battle! I wanna battle!"
"Heeeee!"
After participating in the Battle Royal
"But, Mr. Masked Royal... How'd you even know that we're doing our trials right now? Oh! I get it! Because of our amulets, huh?"
"Well, I'm having a blast!"
"But why are you here? Why would you even wanna do a Battle Royal?"
"...Wow. You're just a ray of sunshine, eh? I think you'd have a lot more fun if you just let yourself have a good time with everybody else. You can do a lot more together, too!"
"Well, I don't know what his deal is, but I thought that battle was just plain fun! That's why I like doing Battle Royals. And my Pokémon seem to like them, too!"
Heahea City
Dimensional Research Lab
"You really think so?!"
"Fearsome Pokémon...?"
"I'm off to check out Diglett's Tunnel next! It's a whole cave made by Pokémon, right?"
Outside Dimensional Research Lab
"Hey, <player>! So you've made it through all three captains' trials, yeah? Then you should go meet Kahuna Olivia! She lives in the town past Diglett's Tunnel."
"Diglett's Tunnel is...let's see... From here, it's kinda near the PMC! It's easy to walk right past it, though, so keep your eyes peeled!"
"Aue! I was wondering who you were playing around with without me, and it's Team Skull!"
"See you on the flip side!"
After defeating the Team Skull Grunts
"Man, <player>, when I fight with you... It's like even my Pokémon feel more at ease! You really are some kind of Trainer. That's it! I've just gotta give you something!"
"Max Ethers will restore all the PP to one of your moves, you know? Pretty great, right?"
"Now I'm gonna go have some more fun with those Diglett! See ya!"
"Aue! You're Kahuna Olivia! I'm Hau from Iki Town! You've gotta let me battle you!"
"Oh, hey, <player>! Guess what? This weird green guy from Aether told me to come to Hano Grand Resort once I finished up with my grand trial here on Akala. Crazy, right?"
"I may not be as strong as my gramps, Hala... But I can still raise up <rival's starter's first evolution Pokémon> and the rest of my team to do their best!"
"Yup! It's good-bye, Akala Island! Though I guess we can come back anytime we want to, huh?"
Heahea City
At the sea port
"Can you believe a big hunk of iron like Aether Paradise can float in the sea?! And it's all cuz of the Pokémon holding it up. Did you know that, <player>?"
I knew that: "Awww... I thought I finally had one up on you."
Really?!: "Knew I could count on you to react!"
"Ho, I can't wait to actually see inside Aether Paradise for myself!"
"Wait? You know who we are? How'd you know that?!"
1F
"Yeah, I took the first chance I had to join in the island challenge once I turned 11! 'Cause, someday, I really want to be able to beat my gramps...but he's way too strong!"
Conservation Area
"Wow!"
"Yeah. My gramps is always saying that nature's got its cruel side, sure as it gives us blessings."
"But can the Aether Foundation really protect all the Pokémon that're out there?"
"That's pretty amazing! The Aether Foundation seems awesome. But why'd you bother setting up a branch in a place like Alola?!"
"Wow, there are even Pokémon that got done in by Team Skull, huh?"
"Wow, Miss Lusamine! I don't know how you do all this! You're, like, not even that much older than us!"
"You are?"
"Wait, WHAT?!"
"L-like what you wear? I don't think anyone else could pull off that kind of look! Except maybe Lillie..."
"Miss Lusamine, stand back! That thing's...not right!"
"<Player>. Can you distract that thing? I've gotta get Miss Lusamine outta here..."
"What? Miss Lusamine, did you say something?"
B1F
"I never thought I'd actually get to see the Ultra Wormhole in my life... We've gotta tell Professor Burnet about this the next time we see her!"
"Yes! Big Malasadas! Awesome! Isn't it crazy how malasadas taste even better when you eat 'em together with someone else?"
"Ho... My heart's still kinda racing, you know? The Ultra Wormhole is real... And Ultra Beasts are real, too! The world is just way too big... I bet we'll discover even more new things on the next island, too! We're gonna need all the energy we can get. Time to dig in!"
"You want a malasada?"
"Ahhh! So gooooooood! Shoot, I already ate the whole thing!"
"Land ahoy! All right! Terra firma under foot again!"
"Ula'ula Island is, like, another totally different place than Melemele or Akala, huh!"
Before battle
"I've got an idea, <player>! Let's have a battle!"
Regardless of choice: "I want my Pokémon to get a deep breath of this fresh new air! Don't worry. I'll make sure both our teams are in fighting form first."
Upon being defeated
"Bwah!! I had my breath held that whole battle!"
After being defeated
"Bwah! That battle took my breath away! I can't breathe the fresh air that way!"
"We're supposed to meet up with the professor, right? Where was it? Malie Garden?"
"Why'd he want us to go to a garden? Guess we'll find out when we get there, right?"
"I heard that they serve tea somewhere here in Malie Garden... I'll start my search from the bridge here. Why don't you start around the edge of the garden?"
"Ho! Professor Kukui!"
Regardless of choice: "Professor! Professor, you gotta hear this! The Ultra Wormhole opened up, like, right in front of us, and there really are Ultra Beasts in there! You've gotta tell Professor Burnet, too!"
"You guys can go ahead without me, Professor. I've got a hot date with a malasada shop! Visiting every last one of them is my own personal island challenge, yeah?"
"Hey, <player>, did you know?"
Of course: "I haven't even finished the question yet."
"There's an observatory up on Mount Hokulani! And you do know what it is they do at an observatory, right? Hope you do, 'cause I sure as heck don't."
"I heard the news from Sophocles! You helped him out with testing da kine, yeah? That totem-calling machine or whatever? I guess I was test subject number two! But I managed to get through the trial. Maybe even managed to get a bit stronger, eh?"
"Here, <player>! I want you to take this!"
"Gah! He's back!"
"What?! N-not that we'd tell you!"
"A disaster? Like...a real disaster? Then what're we supposed to do about it?"
"What do you mean? No matter what? You just gonna leave us hanging?!"
"<Player>... If they're really looking for Cosmog, then... Is Lillie gonna be OK?"
"I don't really get what's going on, but we've just got to keep both of them safe, right?! Then I know what I'm gonna do... Take on my next trial so I can get even stronger!"
"I'm gonna complete my island challenge, and I'm gonna get Tapu Koko to recognize my strength, then I'm gonna be the next island kahuna! I want to make sure more and more people can have fun battling to see who wins or loses! <Player>! Let's both try to become real champions!"
"I won't... If I'd been stronger, then Lillie wouldn't have... I'm ready to do whatever it takes so that we can take back our smiles and our fun adventure!"
"But where was Lillie taken? It couldn't be Po Town. <Player> was there the whole time."
"Aether Paradise?!"
Aether Paradise
B1F
"But... Why would Lillie be here at Aether Paradise?"
"Argh! This guy!"
"Fine. So what are we going to do?"
"You guess? And we're following this guy?! He doesn't have any plan!"
If talked to before using the elevator
"I don't get what is going on here... Why would the Aether Foundation be attacking anybody?!"
If talked to after attempting to use the elevator
"What were you doing there?"
1F
"Aue, look at you, <player>! And Faba is real strong, too!"
"Downstairs?! Oh yeah! Ms. Wicke did say there was another level farther down, didn't she... What do you do down there?!"
If the player selects "No"
"Man, I'm like...stunned by so much of this..."
B2F
"Wow! It's like a secret hideout!"
"So where do we go now?"
"Why do you get the first one? And why do you know all this?"
"You didn't even answer my question... I know what it's gotta be. Nerves, eh? I reckon that you're more afraid to be here than either one of us, huh, Gladion?"
"Here, <player>. You take this."
"Lillie must be scared right now... Let's buckle down and do this!"
"Hey. Focus, people. Where're Lillie and Cosmog?"
"Come on, <player>! Let's split up and look around. Maybe we'll find some clue!"
If talked to again
"Come on, <player?! At least help me look around, would ya?"
After checking the computer
"Wait... So Cosmog might be an Ultra Beast?"
"We should tell Gladion about this!"
"We learned a bit about Cosmog! Like, it might be an Ultra Beast or whatever... and if you stress it a lot, it can create Ultra Wormholes! Maybe to run away or something?"
"But we didn't find any sign of it down here."
"Gladion never really explains anything, eh? Probably thinks it makes him look cool..."
"Should we go after him? We all got into this together. Might as well see it to the end together!"
1F (after clearing B2F)
"<Player>..."
"What do we do?"
"Fine, fine. We can do that. But do you have to say "hmph" all the time?"
"Whoa! <Player>! Battle with me!"
"Phew! Thanks, <player> and <first Pokémon in party>! When you're fighting a battle you can't afford to lose, you really can't waver at all, huh..."
"What d'you mean "young master"?!"
"The president? That's Miss Lusamine, right? She's a really nice person, so I'm sure she'll listen to us if we explain everything."
"Again?!"
"So, uh, Mr. Faba, do you have the key to the president's rooms?"
"So...if you'd just stayed hidden, we would've been stuck here anyway, right?"
"Come on, <player>! Let's show 'em just what our Pokémon are capable of! For Lillie and for Cosmog, too!"
"I wanna help save Lillie, so I'm going ahead! You don't mind, right?!"
"Thanks for the key, Mr. Faba!"
Outside
"Whoa! There's, like, an uku billion Team Skull thugs in this place!"
"So the foundation really was working together with Team Skull?"
"This is, like, way too mind-blowing to think about right now. <Player>! Let's knock some skulls together for now!"
If talked to again
"Don't you do something that makes other people sad!"
Trophy Room
"Whoa! <Player>!"
"Whoa-ho! And Lillie!"
"Man, I'm so glad to see you're OK!"
"What? Daughter? Son?"
"Wait! You all are a family?!"
Entrance Room
"Of course it is! After all, the beasts are real. I'm sure we can find it. We'll find the Legendary Pokémon!"
"Yeah, I'm beat!"
Outside (the next day)
"<Player>!"
"Hey, and it's Lillie...isn't it?! What happened to you?!"
"You look...fantastic!"
"I'm going to train even harder! I've gotta do more!"
"I keep getting saved by <player> and his/her Pokémon, don't I?"
"That's not enough. I've gotta be able to save Pokémon on my own! If I can't do that, I'll never be an island kahuna. I'll never be able to make people really smile!"
"And I still haven't even done Acerola's trial or anything. I've got a lot of catching up to do."
"Yeah... But we got to see things that almost no one would ever get the chance to see! Maybe if I set out to train harder, I'll get to see more amazing things like that again!"
If talked to again
"Guess I should wish you guys a good trip, huh? I'm gonna train up myself and my team real good before I see you again, <player>. Be ready for the shock of a lifetime!"
"So after we split up at Aether Paradise, I went and cleared all the rest of my trials, and then I even went back home to train with Ilima a bit. I was just thinking it was time to take on the Pokémon League... Then I heard from Gladion that you were already heading here, <player>! So I booked it here as fast as I could!"
"That was, like, the fastest I've ever moved in my life, you know!"
"But that's not what I came here to tell you!"
"<Player>! We're gonna decide which one of us'll be the first to the Pokémon League! You're gonna need to use your full force if you think you're gonna beat me and my team when we're serious about winning!"
Upon being defeated
"There may be no winning or losing before true full power!"
After being defeated
"Ooooh, and I really wanted my Pokémon to know how it feels to beat your team this time! But being seriously frustrated will only make me stronger!"
"So you'd better go and become Champion. 'Cause I'm gonna train so that next time I can come beat Champion <player>! Good luck, cuz, and here!"
"I'm really glad that the kid who moved here to Alola turned out to be you, <player>!"
Iki Town
After becoming Champion
"And I'm gonna keep training with Ilima for a while, and then... I'm gonna beat my gramps for real at last!"
"And THEN... I'm coming for you! Champion <player>!"
"I'll explain later, but...but... <player> has to come with me right now! If we don't hurry, the ship is gonna leave!"
Hau'oli City Marina
After becoming Champion
"You didn't tell us!"
"But...but...I haven't gotten to say any of the things that I wanted to say to you! So...so... Arghhh!! I'm gonna send you a letter! A really, really long one! You'd better wait!"
"Ngh... *sniffle*"
"Y-yeah... I...I think I wanna go see my gramps..."
Player's house
Post-credits
"A-lo-la! The salty breeze sang to me and brought me here to you!"
"Oooh! And there's that KantonianMeowth! Look at that shiny coin on your head, kitty-kitty!"
"I finally got my gramps to go all out and be serious in a battle against me! I got some sweet rewards, so take this one, <player>! Good luck is best shared!"
"Now you can power up, too, <player>!"
"Naw! No problem, auntie! Say. Is Kanto, like, really far way?"
Regardless of choice: "All right! Then it's decided! I'm gonna get stronger and stronger, and then I'm gonna travel the world with my Pokémon! I'm gonna go find Lillie! And my dad, too!"
"Oh, yeah, him. Heh... He's a strong Trainer—real strong, I think. But I guess he really hated being the son of a kahuna and everything, yeah? So he works far away from Alola these days."
"I think I'm gonna go train myself up at the Battle Tree, then beat you, <player>... and I'll be a Champion next time I see him! Seems like a nice little present, eh? Hehe!"
"Oh, it's this thing way deep on Poni Island! Anybody who has passed the island challenge—or who is strong enough to, anyway—can battle it out with their Pokémon! Or so they say."
"<Player>! Let's have the best ever battle at that Pokémon League sometime. No backing out!"
"<Player>! I've made it this far, too! But I'm not done yet. After all, there's still a Trainer standing right in front of me that I've got to overcome!"
Upon being defeated
"It's hard to be strong enough to admit that you're weak... you know?"
After being defeated
"Seriously! This is really frustrating, you know? I seriously tried my hardest, you know? But at least I had a blast going all out against you, <player>. So thanks."
Subsequent challenges
Before battle
"The funnest thing in the world has got to be to battle all out, you know? Seriously! So watch out, <player>! 'Cause me and my awesome team are definitely winning this one!"
Upon being defeated
"It's hard to be strong enough to admit that you're weak... you know?"
After being defeated
"I was finally able to beat my gramps when he was going all out, you know? Now I'm not giving up until I can beat Alola's strongest Champion, too! Yeah, I'm looking at you, <player>!"
"Yeah, the kahuna wandered off without a word to anybody, singing a little ditty or something. I'm gonna go stop by home for a sec. I've gotta show my mom <Hau's starter Pokémon>!"
After meeting Hala
"Oh yeah! <Player>! Hold up a sec!"
"You're seriously asking me that?! Who's the one here who forgot to tell anyone before wandering off for a little stroll and a sing without a word, huh?"
"Tutu, isn't that..."
Melemele Festival
"Ho! Howzit, <player>? Man, I thought you'd never make it! Me and <Hau's starter Pokémon>'ve been waiting for ages!"
"Hold on... Didn't anyone explain to you about tonight?!"
Before battle
"Let's have fun with this, <Hau's starter Pokémon>!"
"As long as we both have a good time, then I think we can call it a great battle, eh?"
Upon being defeated
"What? It's already over?!"
After being defeated
"Phew... That was awesome, <player>!"
"That was a really great battle! I had a blast fighting you!"
"Sounds great, right? I can't wait to have a real adventure!"
"Awesome! Thanks, Tutu!"
"I'm gonna make it through the island challenge to try to become an island challenge champion!"
Professor Kukui's laboratory
"A-lo-la!"
"The salty breeze sang to me and brought me here to you!"
"The kahunas sure are something, eh? Able to calm a raging Pokémon without even needing to battle... Now that's something! I mean, I like Tauros plenty and all... but it is pretty scary! I don't want to ride on it!"
"So where are you two off to now?"
"Nice idea! You're always on top of things, Lillie! <Player> just got here to Alola, huh? Then let me tag along, too! I wanna go get something good to eat!"
"Then what're we waiting for! This way! Come on!"
Hau'oli City Beachfront
"Beach time! Yeaaahhh!"
Hau'oli City Shopping District
"He-e-ey! <Player>! I thought I recognized the sound of those feet!"
"So what do you think? Hau'oli is something, eh? Alola's gotta be the best place ever to live!"
"Oh yeah!"
"Hey, <player>. Come in here with me. I've got a good idea of something you could do!"
"Hey, miss. Is it true that you can get some kinda special gift if you have a Rotom Dex?"
"Awesome!"
"Isn't that awesome, <player>? You got a Poké Finder!"
"So, like, what's a Poké Finder?"
"Man, that Rotom Dex is cool! It's like a whole nother partner, <player>! I mean, on top of your Pokémon partner!"
"Oh, but I guess since it's Rotom inside... it pretty much is a Pokémon partner? Either way, you're pretty darn lucky. Meet you outside when you're done in here!"
"We got his/her Rotom Dex upgraded! Now it can take pictures, too!"
"Ahahaha! What was that for, Rotom? Go and put that little trickster back in your Bag, <player>, and follow me! Enough feasting for the eyes... It's time we take care of our stomachs!"
Before battling Team Skull Grunts
"Howzit, <player>! If you're looking for good eats, you've found 'em!"
"Plus, malasadas make your Pokémon like you. And affectionate Pokémon are better in battle!"
"Who could resist giving their Pokémon a few malasadas, eh? They're just so cute!"
"Ohhh. So you're part of that Team Skull, huh? All you guys ever do is steal Totem Stickers and people's Pokémon and get in the way of other people's island challenges!"
"<Player>! Come on! Let's teach these Team Skull jerks not to get in the way of anybody's island challenge!"
After defeating Team Skull Grunts
"Those Team Skull jerks really must have too much time on their hands, yeah? But keeping other people from doing their island challenges isn't gonna just make it like they managed to finish theirs, you know?"
"I already went down to the Marina and screamed out over the ocean, "Watch out, world! Someday I'm gonna beat even my old gramps in an all-out serious battle!" So maybe I'll go try to find some more Totem Stickers next. See you around!"
"You aren't even allowed to go into it unless you're on your island challenge."
"Oh yeah! Almost forgot! I have something pretty amazing to share with you, <player>. You lucky thing!"
"Revives are solid items to have! If your Pokémon faints in battle and can't go on, then a Revive will perk 'em right back up! But you probably won't find Revives here. Didja know that Poké Marts sometimes sell different things? And not just that! The two clerks at the counter even sell different things from one another!"
"Oh yeah! But you've got that Rotom Dex, right? If you tap it and play with it a lot, then you can use Roto Loto, too, right?"
"Awesome! Do it, <player>! Do it! Try Roto Loto for me!"
After obtaining Rotom Powers
"That's so cool! Roto Loto can even make your team stronger! I wonder what other kinda Rotom Powers there are, too!"
If talked to again
"I think I'll get myself a treat at the café to pump myself up before trying the first trial!"
After clearing Ilima's trial
"Howzit, <player>! You made it through Ilima's trial, yeah? Shoot, that settles it! My awesome team and I are gonna go clear that trial next"
"He-e-ey, <player>! Oh! And Lillie's with you, too!"
"Just finished up my trial! Heh!"
"Hey, <player>! I wanna see if I really learned anything from my trial. Let me battle you again!"
Upon being defeated
"Aww, man! I wanted to show off my Pokémon's best side more!"
After being defeated
"So you and me both beat that Totem Pokémon, huh, <player>? Looks like we're getting pretty strong! And I'm not stopping now. I'm gonna use this momentum to beat my old gramps, too!"
"Heh heh, yeah... All thanks to <Hau's starter Pokémon>!"
"It's all a part of the trials, yeah? After you clear one island's trials, you gotta battle that island's kahuna!"
"I don't know about fierce..."
Iki Town
"Oh! If you're heading into Hau'oli, you should totally check out the Shopping Mall! And the Alola Photo Club, too!"
"You know! The one Ilima mentioned! He totally had the right idea. You should go to the Alola Photo Club and take a special photo to remember clearing your first grand trial!"
"Heh heh! I sure hope so, but first... Come on, Tutu! Don't go too easy on me now!"
If talked to again
"If you could beat my gramps, <player>... then there's no way I can lose this battle!"
Hau'oli City Shopping District
"Hey, there you are, <player>!"
"I bet you and <first Pokémon in party> got a great shot together at the photo club, right? Now it's time for our next stop! Akala Island, here we come!"
Regardless of choice: "Man, once I get started with all the poses and the stickers and things, I can't stop myself! I'll spend ages making sure <Hau's starter Pokémon's first evolution stage> is looking awesome, so I should hold off on taking any photos of my own for now. Wouldn't want to leave you bored and hanging!"
"Just think... I wonder what kind of trials we'll face next!"
"Oh. Yeah. So, about that, Professor... I was thinking that I'd really like to head to Akala Island with Mantine! And I want to see <player> take a shot at Mantine Surfing, too!"
Mantine?: "Shoots, yeah! The Mantine from Big Wave Beach on Route 2. You saw them, right?"
But the boat?: "Aw, come on! I really want to ride on a Mantine! Don't you? And I'm totally not just saying that because the professor's boat is such a junk heap, either."
"Yeah! So I'll see you on Akala Island, Professor! <Player>! If you wanna go together, I'll be at Route 2's Big Wave Beach!"
"Hey! <Player>! Glad I ran into you... So we can see who's stronger now! I got a Z-Power Ring from my gramps, too, after making it through his grand trial!"
"Having a battle in a place like Paniola Town feels like we're in a real old-fashioned Western showdown or something, right? This is so cool! Though if we're real honorable cowboys, we've gotta make sure our teams are healthy first."
Before battle
"Awrite, team! <Hau's starter Pokémon's first evolution stage> and Pikachu and everybody, you oughta all be bursting with energy after eating a pile of my mom's special pancakes, so let's show this newbie what Alola's got!"
Upon being defeated
"Nice! How'd you come up with that kind of battle plan? You gotta tell me!"
After being defeated
"Ma-a-an, that was some kinda battle! <Hau's starter Pokémon's first evolution stage> and everybody all look like they had a blast, too!"
"Right then. Here. I'll share my bit of good luck with you, <player>."
"You know how the Totem Pokémon are all, like, surrounded by some aura of power? If you use a Dire Hit on your Pokémon and manage to land a critical hit, that aura won't mean a thing! You might wanna try using some of those Rotom Powers when you're fighting a totem, too! You know, Pokémon battles are just, like, sometimes you win, sometimes you lose. But you're only really a loser if you don't have any fun while you're at it. Right? Anyway, I'm heading off to Paniola Ranch!"
"You know my gramps? Wait. So you think I'm strong?"
"Thanks, <player>. And <first Pokémon in party>, too. You both gave it your all!"
"Phew... Looks like I've gotta train up my team if I'm gonna take on the trial at Brooklet Hill next! Here, <player>, take these with you. We're gonna beat this island challenge!"
"Dude! It's the Masked Royal! I wanna battle! I wanna battle!"
"What?! Gladion, too?!"
After participating in the Battle Royal
"But, Mr. Masked Royal... How'd you even know that we're doing our trials right now? Oh! I get it! Because of our amulets, huh?"
"Well, I'm having a blast!"
"But why are you here? Why would you even wanna do a Battle Royal? You still trying to get stronger or something? Or maybe you just want to make some friends? Heh heh!"
"...Wow. You're just a ray of sunshine, eh? I think you'd have a lot more fun if you just let yourself have a good time with everybody else. You can do a lot more together, too!"
"Well, I don't know what his deal is, but I thought that battle was just plain fun! That's why I'm gonna keep doing Battle Royals. And my Pokémon seem to like them, too!"
"Hey, hey! <Player>! You ever heard of that Festival Plaza thing? I guess it's like a festival or something where lots of people get together and have fun?"
If the player have not visited the Festival Plaza before
"No worries! I'll teach you how to visit it. I just heard about it for the first time, too... Let's see, I think she said... Yeah, you're supposed to open up your X menu, then tap on Festival Plaza!"
"What'd you think, <player>? Pretty fun, right? It's great to get to meet so many different folks! Now I'm gonna go have some fun with my team!"
If the player had visited the Festival Plaza before
"Festival Plaza seems pretty good, huh? Even my old gramps tried it out. It's great to get to meet so many different folks! Now I'm gonna go have some fun with my team!"
"Hey, <player>! Howzit! I knew I heard your footsteps!"
"I finished up Mallow's trial and ate down every last bite of that Super Mallow Special of hers! Boy, that was good enough to break the mouth!"
"You heading to the Dimensional Research Lab? You just keep on going straightaways this way. Maybe I'll catch you there later!"
Heahea City
Dimensional Research Lab
"You really think so?!"
"Fearsome Pokémon...?"
"Being able to go to more places really makes it feel like you're growing along with your partner Pokémon, huh? It's pretty great!"
Outside Dimensional Research Lab
"Hey, <player>! So you've made it through all three captains' trials, yeah? Then you should go meet Kahuna Olivia! She lives in the town past Diglett's Tunnel."
"Diglett's Tunnel is...let's see... From here, it's kinda near the PMC! It's easy to walk right past it, though, so keep your eyes peeled!"
"Aue! I was wondering who you were playing around with without me, and it's Team Skull!"
"See you on the flip side!"
"Man, <player>, when I fight with you... It's like even my Pokémon feel more at ease! You really are some kind of Trainer. That's it! I've just gotta give you something!"
"Max Ethers will restore all the PP to one of your moves, you know? Pretty great, right? It's pretty much like those Roto PP Restores you can get from the Roto Loto, yeah!"
"Now I'm gonna go have some more fun with those Diglett! See ya!"
Akala Outskirts
"Aue! You're Kahuna Olivia! I'm Hau from Iki Town! You've gotta let me battle you!"
"Oh, hey, <player>! Guess what? This weird green guy from Aether told me to come to Hano Grand Resort once I finished up with my grand trial here on Akala. Crazy, right?"
"Maybe I can't show off all <Hau's starter Pokémon's first evolution stage>'s and the rest of my team's strengths like my gramps... But I'm still gonna do the best that I can do!"
"Yup! It's good-bye, Akala Island! Though I guess we can come back anytime we want to, huh?"
"Can you believe a big hunk of iron like Aether Paradise can float in the sea?! And it's all cuz of the Pokémon holding it up. Did you know that, <player>?"
I knew that: "Awww... I thought I finally had one up on you."
Really?!: "Knew I could count on you to react!"
"Ho, I can't wait to actually see inside Aether Paradise for myself!"
"Wait? You know who we are? How'd you know that?!"
1F
"Yeah, I took the first chance I had to join in the island challenge once I turned 11! 'Cause someday I really want to be able to beat my gramps...but he's way too strong! So for now I'll just enjoy my island challenge!"
Conservation Area
"Wow!"
"Yeah. My gramps is always saying that nature's got its cruel side, sure as it gives us blessings."
"But can the Aether Foundation really protect all the Pokémon that're out there?"
"That's pretty amazing! The Aether Foundation seems awesome. But why'd you bother setting up a branch in a place like Alola?!"
"Wow, there are even Pokémon that got done in by Team Skull, huh?"
"Wow, Miss Lusamine! I don't know how you do all this! You're, like, not even that much older than us!"
"You are?"
"Wait, WHAT?!"
"L-like what you wear? I don't think anyone else could pull off that kind of look! Except maybe Lillie..."
"Miss Lusamine, stand back! That thing's...not right!"
"<Player>. Can you distract that thing? I've gotta get Miss Lusamine outta here..."
"Miss Lusamine! Are you OK?!"
"Who the—?! Seriously, what's with that getup?!"
B1F
"I never thought I'd actually get to see the Ultra Wormhole in my life... Never mind meeting people from another world! Man, the surprises just never stop coming! We've gotta tell Professor Burnet about this the next time we see her."
"Yes! Big Malasadas! Awesome! Isn't it crazy how malasadas taste even better when you eat 'em together with someone else?"
"Ho... My heart's still kinda racing, you know? The Ultra Wormhole is real... And Ultra Beasts are real, too! And now this Ultra Recon Squad, too! The world is just way too big... I bet we'll discover even more new things on the next island, too! We're gonna need all the energy we can get. Time to dig in!"
"You want a malasada?"
"Ahhh! So gooooooood! Shoot, I already ate the whole thing!"
"Land ahoy! All right! Terra firma under foot again!"
"Ula'ula Island is, like, another totally different place than Melemele or Akala, huh!"
"We're supposed to meet up with the professor, right? Where was it? Malie Garden?"
"Why'd he want us to go to a garden? Guess we'll find out when we get there, right?"
Before battle
"I had a great idea, <player>! Come on, let's have a battle!"
Sure: "All right! Then let's go full powered on this one!"
No way: "Aww! Are you just trying to bring me down or what?"
Upon being defeated
"Bwah!! I had my breath held that whole battle!"
After being defeated
"You know what, <player>? You should take this Lycanium Z, too! It came as a set with those Big Malasadas that Ms. Wicke gave me, but I don't plan on adding any Lycanroc to my team or anything."
"You and your Pokémon looked like you were having a blast, <player>! I guess it's like my gramps said... Go beyond winning and losing, and learn to find joy in any battle...then you'll find that you're getting strong before you even know it!"
"What? You mad that I still don't seem to be getting all that much stronger? I sure hope not! Me and my partner oughta be, like, totally in sync with one another!"
"We'll get there, buddy. Now I guess we should go try to track down Professor Kukui in Malie Garden, right?"
"I heard that they serve tea somewhere here in Malie Garden... I'll start my search from the bridge here. Why don't you start around the edge of the garden?"
"Ho! Professor Kukui!"
"Professor! Professor! You gotta hear this! An Ultra Wormhole opened up, like, right in front of us, and there really are Ultra Beasts in there! And aliens from other worlds, too! You've gotta tell Professor Burnet, too!"
"You guys can go ahead without me, Professor. I've got a hot date with a malasada shop! I'm gonna get my Pokémon some treats so they'll really start to like me!"
"Hey, <player>, did you know?"
Of course: "I haven't even finished the question yet."
"There's an observatory up on Mount Hokulani! And you do know what it is they do at an observatory, right? Hope you do, 'cause I sure as heck don't."
"Now I'm out!"
Malie Garden
After defeating Guzma
"And you're Guzma...? So?"
"Uh, yeah, I did! That was an awesome battle, <player>!"
If talked to again
"You remember what my gramps told us? He said we'd meet Pokémon and people on our journey that'd enrich our lives, yeah? I mean...I'm having a good time on my journey, for sure, but...maybe that's not enough?"
"Phew, that Togedemaru was strong! But I managed to get through the trial, too. Maybe even managed to get a bit stronger, eh?"
"I heard from Sophocles how you just breezed through that trial yourself, <player>. You're something else! I know! You should take this!"
"Gah! He's back!"
"What?! N-not that we'd tell you!"
"A disaster? Like...a real disaster? Then what're we supposed to do about it?"
"What do you mean? No matter what? You just gonna leave us hanging?!"
"<Player>... If they're really looking for Cosmog, then... Is Lillie gonna be OK?"
"I don't really get what's going on, but we've just got to keep both of them safe, right?! Then I know what I'm gonna do. Take on the next trials to train with my partner!"
"Look, I know Guzma was saying all those things, but I really wanna complete my island challenge and help people learn about Pokémon battling! And, I dunno, I've gotta make sure I really get what my partner's feeling, too!"
"Phew... Look, <player>! Seems like we're almost to the Aether House, where the captain is supposed to be, huh?"
"So that way lies Mount Lanakila, huh? I guess they're really making a Pokémon League up there on the peak..."
"The professor told me that Pokémon Leagues in other regions have four crazy-strong Trainers in them that they call the Elite Four!"
"The Elite Four and our island kahunas... I wonder which ones are stronger! I'm pretty sure my gramps is the strongest, but I can't wait to find out for sure!"
"Hey! Alola!"
"I don't really get what all that was about... But it seems like those Ultra Recon Squad people are in a pretty hopeless spot, huh?"
"I just wish everybody could be happy and find something to smile about. Even that Necrozma. Right, <player>?"
"Ugh... Battles you can't afford to lose aren't any fun..."
Aether House
After Acerola's trial
"If we want to get the Pokémon back... then <player> has to go to Po Town... All alone? With no backup? That's what they said, but...that's not fair!"
"I-I'm sorry, <player>. It's my fault... Now you've got to put yourself in danger because...I couldn't stop them..."
Aether House
After defeating Guzma
"<Player>... I'm sorry! I...I can't even make myself smile right now..."
"That Plumeria lady came back as soon as Acerola had left..."
"I'm supposed to be a Trainer! I've got all these Pokémon with me! But when it came down to it, Lillie had to protect me... Lillie, who's not even a Trainer to begin with!"
"Geh! You know who Lillie is?!"
If the player did not leave with Gladion
"<Player>... What should we do? Even if I go to the ferry terminal, too... What if I just get in you guys' way? The way I am now, I'd just..."
Malie City
"<Player>!"
"If I'd been stronger... If I'd been the kind of Trainer who could seize victory, like <Hau's starter Pokémon's first evolution stage> wants, too... Then Lillie wouldn't have... I'm ready to do whatever it takes now!"
"But where was Lillie taken? It couldn't be Po Town. <Player> was there the whole time."
"Aether Paradise?!"
Aether Paradise
B1F
"But... Why would Lillie be here at Aether Paradise?"
"Argh! This guy!"
"Fine. So what are we going to do?"
"You guess? And we're following this guy?! He doesn't have any plan!"
If talked to before using the elevator
"I don't get what is going on here... Why would the Aether Foundation be attacking anybody?!"
If talked to after attempting to use the elevator
"What were you doing there?"
1F
"Aue, look at you, <player>! And Faba is real strong, too!"
"Downstairs?! Oh yeah! Ms. Wicke did say there was another level farther down, didn't she... What do you do down there?!"
If the player selects "No"
"Man, I'm like...stunned by so much of this..."
B2F
"Wow! It's like a secret hideout!"
"So where do we go now?"
"Why do you get the first one? And why do you know all this?"
"You didn't even answer my question... I know what it's gotta be. Nerves, eh? I reckon that you're more afraid to be here than either one of us, huh, Gladion?"
"Here, <player>. You take this."
"Lillie must be scared right now... Let's buckle down and do this!"
"Hey. Focus, people. Where're Lillie and Cosmog?"
"Come on, <player>! Let's split up and look around. Maybe we'll find some clue!"
If talked to again
"Come on, <player>! At least help me look around, would ya?"
After checking the computer
"Wait... So Cosmog might be an Ultra Beast?"
"We should tell Gladion about this!"
"We learned a bit about Cosmog! Like, it might be an Ultra Beast or whatever... and if you stress it a lot, it can create Ultra Wormholes! Maybe to run away or something?"
"But we didn't find any sign of it down here."
"Gladion never really explains anything, eh? Probably thinks it makes him look cool..."
"Should we go after him? We all got into this together. Might as well see it to the end together!"
1F (after clearing B2F)
"<Player>..."
"What do we do?"
"Fine, fine. We can do that. But do you have to say "hmph" all the time?"
"Whoa! <Player>! Battle with me!"
"Phew! Thanks, <player> and <first Pokémon in party>! If I really got my partner better, maybe I'd even be able to enjoy the kind of battle you can't afford to lose..."
"What d'you mean "young master"?!"
"The president? That's Miss Lusamine, right? She's a really nice person, so I'm sure she'll listen to us if we explain everything."
"Again?!"
"Wow, Mr. Faba! You're so nice!"
"We didn't even have to ask you where the president was, and you just confirmed it for us! So the president is up ahead, huh? Thanks! Now we know where to find Cosmog and Lillie!"
"Come on, <player>! I know <Hau's starter's final evolution Pokémon> and the rest of our Pokémon feel the same way we do. We can save Lillie and Cosmog for sure!"
"I wanna help save Lillie, so I'm going ahead! You don't mind, right?!"
"Thanks for even giving us the key, Mr. Faba! You've been a big help!"
Outside
"Whoa! There's, like, an uku billion Team Skull thugs in this place!"
"So the foundation really was working together with Team Skull?"
"This is, like, way too mind-blowing to think about right now. <Player>! Let's knock some skulls together for now!"
If talked to again
"Don't you do something that makes other people sad!"
Trophy Room
"Whoa! <Player>!"
"Whoa-ho! And Lillie!"
"Man, I'm so glad to see you're OK!"
"What? Daughter? Son?"
"Wait! You all are a family?!"
Entrance Room
"Yeah, I'm beat!"
Outside (the next day)
"<Player>!"
"Hey, and it's Lillie...isn't it?! What happened to you?!"
"You're all...amazing! That's it! I've decided!"
"I keep getting saved by <player> and my partner <Hau's starter's final evolution Pokémon>, right?"
"If I keep being like this and I don't change, then I'm gonna get left behind by you all."
"I really wanted to save Lillie and Cosmog! When my partner and I both felt that way and we were in sync, we were so much stronger... That's how it felt to me. So..."
"I'm gonna try to chase that feeling down again, together with <Hau's starter's final evolution Pokémon> and my team!"
"Sure, you might've been a part of it... But in the end, the only one who's gonna make me change is me. And besides, Miss Lusamine is out there trying to keep Alola safe, right? I knew she was a good person!"
If talked to again
"Guess I should wish you guys a good trip, huh? I'm gonna train up myself and my team real good before I see you again, <player>. Be ready for the shock of a lifetime!"
"Hey! I know you're happy that we beat Ilima and all, but you've still gotta wait for me, partner! Oh! Hey, <player>! I heard the news from Gladion, you know. Savior of Alola, huh? Heh heh! I'm glad I got to set out on my island challenge together with such an awesome Trainer. But I'm not slacking off, either! It's good to have fun in battle, sure... But losing a battle because all you're really doing is having fun is...well... You can't let down your Pokémon when they're fighting their hardest for you, now can you?"
"Right, <Hau's starter's final evolution Pokémon>?"
"I know you want to win... And I'm gonna make sure that happens!"
"And here, <player>. Have a Max Elixir! You should go ahead and use one when battle is dragging on and on!"
"When we're both done with our island challenges, we should have a serious battle. You and me. Pokémon and their Trainers have gotta have their hearts in the same place if they're gonna win in battle! That's the way to really have a blast together!"
Aether House
"Hey! If it isn't <player> and Guzma! What're the two of you doing together?"
"Oh yeah! I've got something I wanted to ask you, Guzma! That Golisopod you've got, yeah..."
"So you got to meet your Pokémon partners by doing the island challenge and made some really great friends, too, huh?"
Regardless of choice: "You know! Everybody in Team Skull! They all really love Guzma after all, right?"
"Just you wait, Guzma! I'm gonna outdo even the kahunas! And I'm gonna make sure everybody knows they can be something great, whether they choose to do the island challenge or not!"
"You didn't fail to become a captain, Guzma! No matter what you might think! So go become something else—something that nobody else has ever managed to be!"
"<Player>! Consider this one last warning! I told you before, but once we both finish up our island challenges, we're gonna have a serious battle—you and me!"
"You know what? Something kinda hit me after I finally beat my old gramps in an all-out serious battle. You're kinda my hero, <player>! You and your team are, I mean! And because I really look up to you... I really wanna have a serious battle against you! I really want to be able to win against you! 'Cause it's way more fun when Pokémon and their Trainers are all friends and get along. Then they can do something really amazing!"
Upon being defeated
"We're gonna keep moving forward, by staying at full power all the time!"
After being defeated
"We managed to pull off something pretty amazing, when my partners and I were all in sync and wanting the same thing. But looks like we're still one step away from being the strongest Trainer and team! But you know what's funny? Even though we lost, that was more exciting than any other battle I've ever had till now! Everything's all mixed up inside me—it was so fun and so frustrating, and just... Yup! It was just awesome, really!"
"Come on, <player>! Let's go celebrate you becoming Alola's first ever Champion together with everybody! My old gramps said we'd have an awesome party, no matter which one of us won!"
Iki Town
After becoming Champion
"I may have lost, but I'm gonna keep working hard to be totally in sync with my partners and pull out my Pokémon's full power! And THEN... I'm coming for you! Champion <player>!"
"If you head into Poni Grove here, there're Ultra Beasts right here in Alola!"
"My <Hau's starter's final evolution Pokémon> loves malasadas, too! Thanks, Ms. Wicke!"
"Man, that Gladion... He just doesn't want to let me win, does he? When he gets back from that training of his, I'm definitely asking him for a battle!"
After battling the second BlacephalonUS/StakatakaUM
"<Player>!"
"Those were some epic battles! <Hau's starter's final evolution Pokémon> had a good time, too! C'mon, <player>. Let's head home!"
Iki Town
Post-credits
"I was just talking to <Hau's starter's final evolution Pokémon> here about all our memories from our island challenge! We really were lucky to meet so many different Pokémon and people, huh? But there're even more out there for us to meet, wherever we might go next! That's why my island challenge isn't really over!"
Hau debuted in No Stone Unturned!, where he was training with Dartrix, only for its attacks to hit Ash, Rotom, and Pikachu. Hau became excited upon seeing Ash's Z-Ring and asked if he had taken part in Hala's grand trial. Hau then had a battle against Ash, using Dartrix against Rowlet. Hau ended up winning when Ash dropped his Grassium Z. Ash suggested they have another battle, but Hau was about to have a meeting with his father, so he declined but promised to meet up the next day for a rematch. The next day, they conducted their rematch after Rowlet learned how to use Seed Bomb, but it was still not enough to defeat it. In a last-ditch effect, Ash and Rowlet performed the Z-MoveBloom Doom, which was able to defeat Dartrix.
In SM129, Hau competed in the Battle Royal preliminary round of the Manalo Conference with his AlolanRaichu and was able to progress to the Top 16. The match-ups revealed that he would be battling Samson Oak. In SM130, Hau went up against Samson in the first round of the Manalo Conference. He used his Raichu against Samson's Alolan Exeggutor and eventually won, advancing to the second round.
In SM131, Hau approached Ash with his Decidueye upon learning that they would be battling each other in the next round of the Manalo Conference. In SM132, Hau went to search for Ash, who was late for their battle due to his training with Rowlet. After finding him and making it to the battlefield with him, Hau and Ash began their battle. During the battle, Decidueye was able to dodge Rowlet's Bloom Doom, before using its own Z-Move, Sinister Arrow Raid, which was barely avoided by Rowlet. The battle concluded in SM133 after Decidueye was defeated by Rowlet's Brave Bird, thus eliminating Hau from the tournament. Though he congratulated Ash for his victory, Hau was left dismayed by his loss, but he was comforted by Hala, who complimented him for the battle.
In SM135, Hau watched the battle between Kiawe and Gladion in the stands. He reappeared in SM136.
Pokémon
This listing is of Hau's known Pokémon in the anime:
When Ash met Hau again in SM128, Dartrix was revealed to have evolved into Decidueye. Hau later used Decidueye during the battle against Team Skull, where it went up against Rapp and her Zubat and won.
In SM132, Hau chose Decidueye as his Pokémon to face against Ash's Rowlet in the second round of the Manalo Conference, where it was knocked out by Brave Bird, eliminating Hau from the tournament.
AlolanRaichu is Hau's second Pokémon, which first appeared in SM129, where it was used in the Battle Royal preliminary round of the Manalo Conference, being able to progress its Trainer to the actual tournament.
In SM130, Hau used Raichu in his match against Samson Oak and his Alolan Exeggutor. The battle ended in Hau's victory, advancing him to the second round.
In The Announcement and the Prize, Hau faced Gladion in the first round. During their battle, Gladion asked why Hau joined the tournament and assumed he wanted to surpass his grandfather, Hala. When Hau replied that he thought it'd be fun, Gladion called him weak and won the battle.
In PASM16, Hau met Ilima at the Melemele IslandTrainers' School and requested to join him and the other Trial Captains in confronting Team Skull at their hideout in Po Town. Hau wanted to meet Guzma, who was a student of Hala's, but ended up believing that only victories mattered in battles. After Ilima accepted, Hau went off to buy malasadas, as he believed that with food, everyone might get along easier. Later that day, Hau and Ilima met with Lana, Kiawe, Mallow, and Acerola at Po Town. Their presence alerted Guzma, who demanded to know why his base was being invaded. When the Hau and the Captains revealed they only wanted to talk, Guzma agreed on the condition they made it to him first. He then summoned a Pheromosa, Celesteela, and Guzzlord; and had them attack Hau and the Captains. Despite their best efforts, Hau and the others were completely outmatched by the rampaging Ultra Beasts.
In PASM18, Sun arrived at Po Town, only to get caught up in the commotion. Annoyed Hau and the Captains were still fighting, Guzma revealed a Cosmog and had it open more Ultra Wormholes. Gladion appeared, demanding to know where Guzma got the Cosmog and Ultra Beasts from. Revealing his true aim is to destroy Ultra Beasts, Gladion battled the beasts Guzma summoned with his Type: Null. To everyone's shock, Gladion also revealed the Aether Foundation's president, Lusamine, was the one who gave Guzma Cosmog as part of her plan to create a paradise filled with nothing but Ultra Beasts and herself. Eventually, the Ultra Beasts broke out of Po Town's barrier, allowing them to wreak havoc across Ula'ula Island.
Six months later, Hau traveled to Exeggutor Island, where the Trial Captains and Island Kahunas had been training in preparation to face the Ultra Beasts. Despite Hala initially refusing to let him join the others in training, Hau requested to participate in the battle to protect Alola, revealing that he had been training by himself while traveling around Alola and unknowingly obtained a Sparkling Stone, which was made into a Z-Ring by Olivia. Seeing the Z-Ring and Hau's determination, Hala agreed to train his grandson.
Pikachu is Hau's first known Pokémon. It was first used as a Pichu at the Iki Town festival tournament to battle Gladion's Porygon. Eventually, it was defeated, forcing Hau to switch for Komala. Sometime during Hau's solo training session, it evolved into a Pikachu.
Komala is Hau's second known Pokémon. It was first used at the Iki Town festival tournament to replace Pichu after it was defeated. In retaliation, Gladion sent out his Type: Null and used it to battle Komala. Eventually, it was defeated.