Cheren is a childhood friend of the player who, like the player, lives in the starting town of Nuvema Town. While he holds a greater knowledge in Pokémon than his friends and tends to offer the player advice during the course of their journey, his comments are often witty and intellectual. He also misunderstands Bianca's humor often, to her dismay. Whilst Professor Juniper describes him as being very honest, she also remarks that he can be 'a little difficult'; his impatience in particular is often seen throughout the earlier stages of his journey. He is also described as being quite judgmental by Alder.
In keeping with the theme of truth and ideals often seen in Black and White, Cheren represents those who pursue ideals—more precisely, as N pointed out in Chargestone Cave, the ideal of strength. His goal is to become the Champion and always strives to become stronger- yet the first time that Alder asked him why he strives to become stronger, he was quite unsure of his reasons. He then starts to ponder to himself how to do so—something that Alder said he used to do with his partner Pokémon as well—and what exactly it means to be strong. Alder also remarked that Cheren is a lot like Marshal.
Like the player and Bianca, Cheren receives a starter Pokémon as a gift from Professor Juniper at the start of the game. He always chooses the starter with a type advantage over the player's starter. The player will encounter and battle him several times throughout the game.
"<player>! I heard from Professor Juniper. We can have a Pokémon? ... What's keeping Bianca?"
"Bianca... I've known for ten years that you have no sense of time, but...seriously... Today's the day we can get a Pokémon from Professor Juniper!"
"Naturally. The Pokémon are waiting for us inside that gift box. OK, <player>, you go first and take a peek at the gift box. I want to meet the Pokémon right now!"
"Would you get a move on and open the gift box already? I'm sure the Pokémon are just as excited to meet us!"
"Hey, how come you get to pick out my Pokémon? Oh, never mind. I wanted <his starter> from the start, anyway."
"Honestly, Bianca... Even though they're still weak Pokémon, you shouldn't have Pokémon battles inside a house."
"Uh... ... Bianca, would you take a look around?"
"You... are completely hopeless. Here! I'll restore your Pokémon for you. <player>'s Pokémon need to be fixed up, too."
"I believe you're right! It'll be no problem for me to keep the room from getting any messier. Besides, it's not fair if you two are the only ones who get to have fun battling! It's decided. You'll be my opponent... in our first Pokémon battle! Let's see what you can do, <his starter>!"
After first move
"I've finally become a Trainer... Everything starts from here!"
After defeat
"Ah! So that's a Pokémon battle!"
After losing
"I made a strange blunder in my first battle, but this feeling I have... I'm finally a Trainer. But first, we'd better go apologize to your mother about this messed-up room."
After winning
"This feeling... Finally, I'm a Trainer. On top of that, we'd better go apologize to your mother about this room."
After battle
"I'm very sorry about all the trouble, ma'am."
"Yes, thank you! Please excuse us. Come on. Let's go thank Professor Juniper. I'll be waiting in front of the Pokémon Research Lab."
Outside lab
"I'm sorry, but could you go to Bianca's house? I'll bet she's spacing out like she usually does. She's totally flighty."
"OK! Let's go meet the professor."
"<player>! I understand the feeling. I want to go somewhere with my Pokémon too, but first we have to go thank Professor Juniper. Come on the lab is this way!"
In the lab
"Professor Juniper? We know your name."
"It's for the Pokédex, right?"
"Thank you very much. Because of you, I can become a Pokémon Trainer, exactly as I've always wished."
"Of course. We can travel however we want while we complete the Pokédex."
"Finally, I can become a Pokémon Trainer. I'll have real battles with other Trainers and get stronger. Wait and see!"
Outside lab again
"I'll take good care of it."
"If I use the Town Map, I'll always know where I am... That's certainly helpful. Shall we head to Route 1? The professor's waiting."
Near Route 1
"Bianca says if we're starting a journey together, she wants us all to take our first step at the same time."
"OK, here we go!"
At Route 1
"It sure is! C'mon, the professor's waiting."
"Professor Juniper, I'm sorry to have kept you waiting."
"She forgot to say that Pokémon jump out at you in the tall grass. I'm heading to Accumula Town, too."
"But we need to get going! I'd imagine the professor's waiting, too."
"Huh. Actually, that sounds interesting. It will fill up Pokédex pages, so I'm sure it will please the professor, too. OK, then. Until we reach Accumula Town, take care of healing your Pokémon at your own house."
"<player>, are you going to compare yourself with Bianca? Both Bianca and I have two Pokémon with us."
"Incidentally, if you check your Pokédex, you'll see how many Pokémon you've found and how many you've caught. I'm off to Accumula Town! The professor is waiting."
"Well, I'm going on ahead."
At Accumula Town
"Wasn't that the professor waiting in front of the Pokémon Center? I know about the Pokémon Center already. Anyway, I want to battle soon! Real battles are the best way to become stronger, you know!"
"<player>, come here a sec."
"Slow down. You talk too fast. And what's this about Pokémon...talking? That's an odd thing to say."
"My name is Cheren, and this is <player>. We were asked to complete the Pokédex and we just left on our journey. My main goal is to become the Champion, though."
"Huh... Strange guy. But I'm not going to worry about it. Trainers and Pokémon help each other out! Listen, I'm going on ahead. I want to battle the Gym Leader in the next town- Striaton City. Aim to battle Gym Leader after Gym Leader. The best way for a Trainer to become stronger is to challenge the Gym Leader in each area."
At Striaton City
"When a Pokémon is poisoned, its HP decreases while it is battling. Hey, <player>. Have you come looking for the Gym Leader?"
Yes: "He was here talking about Pokémon types until just a few moments ago... Maybe you walked right past him?
No: "Nothing improves your skill as a Trainer like real battles. That's why challenging Gym Leaders is great practice."
"By the way, <player>, will you have a battle with me? I want to test how important items are in battles."
Yes: "Well, let's see how effective my items are... Or maybe I should test how well I can battle without items...? Anyway, this is an indoor match, so let's battle without getting too rough!"
No: "Really? I really want to try out my items, so I'll just wait here until you decide you're ready."
After first move
"Moves that never miss and moves that can attack first... There sure are a lot of different moves."
Sending out last Pokémon
"It's important to choose which item your Pokémon holds..."
After defeat
"I see! Losing to you means that I still have a lot to learn."
"So learning to use items well is definitely important, then. Oh, here. <player>, I'll give you these Berries."
"If you give a Pokémon this kind of Berry to hold, it will eat it to heal up when its HP goes down in battle. But if you give Pokémon man-made items like Potions to hold, they can't use them. Well, good luck, then."
"<player>, stop! We both have a Trio Badge, so let's see which of us is stronger!"
After first move
"Ugh! You choose a good move, as usual."'
Last Pokémon with low health:
"With my knowledge, I can bring out the strength of my Pokémon!"
After defeat:
"Why do you keep beating me? We have the same number of Gym Badges. We should be equals in strength..."
"I see. So that's how you battle."
"What was that about? Bianca? Why are you running?"
"That way, but... Why are you running now?"
"Bianca, really, why were you running?"
"You should have spoken up sooner! <player>, we're going to get that Pokémon back. Bianca! Please stay by the girl's side."
"They ran inside here! <player>, your Pokémon's HP is fine, and you're ready to go, right?"
Yes: "Then let's go."
No: "I could never forgive myself if we were to lose to the kinds of thugs who would take people's Pokémon! I'll wait here. Hurry and get ready!
Near the first patch of Dark Grass
"<player>, stop!"
"That dark tall grass over there... Every now and again, two Pokémon will pop out at the same time. In other words, you have to be careful in the darker grass."
"<player>! This bothersome bunch doesn't really listen to reason."
"Not bad, <player>. OK, go return the Pokémon to that girl."
"So, there were more of them... Still, why are Pokémon robbers acting so self-righteous?"
"<player>! We've been friends our whole lives. we've got each other's back when it counts. Let's show them how it's done!"
"Whatever... What a waste of time. Come on, what reason could possibly justify stealing Pokémon from people?"
"What do you mean, Trainers are making Pokémon suffer? I don't get that at all!"
"Trainers bring out their Pokémon's strength. Pokémon believe in their Trainers and respond to that. I don't understand what about that makes Pokémon suffer!"
"OK, <player>, I'll return the Pokémon."
At Nacrene City
"Come with me a sec."
"If you go straight from here, there's a Pokémon Center. And... use these if you want."
"Give your Pokémon a Chesto Berry to hold. Then, if it ever falls asleep, it will wake up immediately. Oh, and another piece of advice-- Nacrene City's Gym Leader uses Template:Type2s. If you have a Template:Type2 Pokémon, it might give you a big advantage."
"<player>, is there some kind of problem?"
"For now, all we need to do is protect the museum, right?"
At the museum
"So I can't battle the Gym Leader because of Team Plasma, huh... What a bother."
"Hey, <player>. I just challenged the Gym Leader Burgh. He's a seasoned Gym Leader. He made me work for that Gym Badge! But for me, Template:Type2 Pokémon aren't much of a challenge. I'm going to keep winning like this against all of the Unova region's Gym Leaders! Then I'll head for the Pokémon League and outperform the Champion! If I do that, everyone will admit what a strong Trainer I am... That will make me feel truly alive..."
"I believe it would be wise for me to catch some Ground-type Pokémon. Or perhaps I should strengthen my Pokémon. What's my best path forward?"
"Hey, <player>. I've been waiting for you to get the Insect Badge. And now it's time to see which one of us is the stronger Trainer!"
After first move
"You seem to understand the importance of the first attack very well."
Last Pokémon low on health
"If I can bring out the power of my Pokémon, I can still pull this off and win."
After defeat
"Impressive. But why can't I win?!"
"It's now clear to me. The reason you are so tough is the trust between you and your Pokémon. But...that shouldn't be a problem. I can get more out of <his starter's first evolved form> and my other Pokémon, too."
"It seems the Professor gave us the Pokédex as a reason to send us on a journey. At least, that's what my mom told me. They wanted us to go out and see the world, so my mom, Bianca's mom, and your mom made a request to Professor Juniper. <player>, what should we do now? I think I'd like to show the professor my thanks by going to Route 4 and catching some Pokémon I haven't yet caught."
"What a bother. We're grateful that you lowered the bridge, but how is it our fault that they escaped?"
"Well, I suppose that's fair. But really, we would have looked for Team Plasma even if he hadn't asked. I can get stronger while beating that bothersome bunch... <player>! I'll go on ahead."
"Well, we avoided a fight in the middle of the city, anyway. Still, I can't help but think Ghetsis isn't just an ordinary person. I'm off to go make my Pokémon stronger. I really don't want to lose to that Clay guy. Actually, I'm going to win my Gym Badge in a flawless victory!"
"<player>... Do you think Team Plasma could be in there? I don't like cold places, but we have to check. What a bother."
"All right, <player>. Let's get this over with."
Inside
"Well... Still. Is there anything more important than strength for Trainers, like the Champion said? Oh, I'll never understand just by thinking about it. What a bother. Let's hurry up and check the inside."
"Oh... Is someone in there?"
Yes: "Shall we go, then?"
No: "But the only place in the Cold Storage we haven't searched is here, right?"
"What's wrong? Aren't you going to check the inside?"
"Whatever. I can't believe you were really hiding. It's a bother, but if you're cold, shall I show you outside?"
"<player>! Let's each take care of one side!"
"<player>, you take care of those guys over there!"
"Whatever... Team Plasma's ideal... Separating people and Pokémon... It's exactly the same as not having Pokémon in this world at all. That bunch is a waste of oxygen. <player>... It's cold, so I'm getting out of here."
"<player>! Since we both hold the Jet Badge now, let's see which of us is stronger!"
After first move
"Your strength... And my strength... Right. Let's test them."
Sending out last Pokémon
"Can you be strong even if you lose? Is winning everything?"
After defeat
"Pokémon battles are fun. But what is it to be truly strong?"
"If it isn't the Champion, Alder. I'm weak, so I lost! ...And, honestly, it bothers me when you call it a fine battle despite that."
"If I get strong and become a Champion, that will be the reason for my existence. I want to prove that I'm really living."
"What I do with my power... I don't know that answer yet. First, I want to become a stronger Trainer so everyone will acknowledge that power! <player>... Next time, I will win!"
Inside
"Oh, <player>."
"Is that so."
"I thought he was going to get us involved in all that bother again, so I was bracing myself before I knew it. I'm going in first, but I'll be seeing you."
"So if you want to set Pokémon free... If that's what you want, you should start with your own. But taking people's Pokémon by force is not right. That is not real strength!"
"Those guys... I don't know what they've found, but they go the extra mile to gain power and cause trouble. What a bothersome bunch..."
"<player>... I'm going to stay here for a while. I want to think a little bit about what the Champion asked me... What do I want to do with my power after I get strong? And why do I want to be strong in the first place?"
"<player>, I've been talking with Bianca, and I'm wondering... Since we left Nuvema Town, has something about me...changed? Thinking about what I want to do... Thinking about what I should do... It felt like there was nothing... Have I really become stronger? Or is it just my Pokémon that have? I don't know anymore!"
"<player>! You can walk on the fallen columns, too. I'm going after Team Plasma!"
"This is nothing! But there sure are a lot of them... Oh, what a complete bother!"
"Why do you make that extra push? What is the source of that strength?"
"<player>, did you see what flew off just now?"
"Why? That was that guy N, right? Why was he with the legendary Pokémon? He couldn't really be the hero, could he?! Also, did I hear him tell you to search for the other legendary Pokémon?"
"That guy called N... Team Plasma's boss apparently reawakened the legendary Pokémon. He told <player> to look for the other legendary Pokémon, then flew away..."
"I think I understand better now. Being able to do something for Pokémon--for somebody at a time like this--is strength... I'm sure of it. And my strength is something that is given to me by Pokémon. OK, Champion, let's hurry!"
"Stop, <player>! That's the entrance to the Relic Castle. You're impressive, <player>, making it here before I did. Dealing with the Desert Resort's Pokémon took longer than I would've thought. I only made it all the way out here thanks to my Pokémon. Alder went on ahead. Let's hurry."
"Whew! I finally caught up."
"Alder... What are you going to do now?"
"Alder... Why don't we go outside for now?"
"It's hard to put into words... but I'll never forgive them for this!"
"I'll look around here once more. I don't want to believe what that Ghetsis says... You should head for the Nacrene City Museum."
"Stop! <player>! Drayden and Professor Juniper told me. You're heading for the Pokémon League, right?"
Yes: "Since it's Alder... Since it's the Champion, I think it will be all right."
No: "Now is not the time to be modest, <player>."
"Worst-case scenario... you'll be battling Team Plasma's boss, N. I need to know if you can handle it!"
After first move
"I will use everything that I've learned on this journey!"
Sending out last Pokémon
"My Pokémon and I will put all our energy into this battle!"
After defeat
"Thank you. You are really great."
"Yep, you are something else. And I mean that sincerely. Right. Now, I have to make your Pokémon healthy."
"Right now, there's no way I can compete with you, <player>. If there is anything I can do to help in the battle with N, just say so..."
"Funny? At a time like this..."
"...So that's what you mean. ...You are right that we're all different and we should do the things that we can do. There are as many truths and ideals as there are people and Pokémon. The most important thing is that we help one another out. That's why people and Pokémon are always by each other's side. That's what I've come to think lately... <player>! If anything happens to you or Alder, I will do everything I can to help you. That's why I have to keep training and getting stronger. Just...don't be reckless, OK?"
At Pokémon League
"Mr. Alder, you're a wreck. It's not fitting for the Champion."
"Somehow, I beat the Pokémon League, but it wasn't easy."
"I became stronger because I understood what I want to do."
"<player>! Tell N this... Some people grow stronger by being with Pokémon. My Pokémon and I are proof. Together, we learned and became stronger."
"Rule the world?? Wasn't Team Plasma's goal to liberate Pokémon?"
"Alder, it's a waste of valuable time listening to him ramble on. He is the one without a human heart!"
At Nuvema Town (post-game)
"Hey, <player>. Is Looker through talking to you?"
"If that's the case... I let Ghetsis escape when the Shadow Triad created an opening."
"I'll tell you later about what happened in the castle. It's more important to ask what you plan to do now, Bianca."
"That's the city on the other side of Route 16 when you leave from Nimbasa City. Hmm. If you go that way, you might be able to meet all sorts of Pokémon you've never seen before."
"Huh. Bianca's as impetuous as ever, no matter what is going on. I think I'll travel all the way around Unova, starting at Route 1 again. I'm sure I'll discover lots of new things. Could be I'll encounter the Seven Sages along the way... And, <player>, if we spy each other along the way, let's battle again, OK?"
At Route 5 (post-game)
"Strength and strength alone is what matters in this world. So I believed, until I met Alder here. But, winning in Pokémon battles isn't all there is to life. Once I learned that lesson, my eyes were opened to many different things. We all have our own brand of strength, people and Pokémon both. The strength to make our dreams a reality, the strength to protect what we hold most dear... Why do I think this way now? It's thanks to you, <player>... And Bianca... And Alder... If only N could see this, too, someday."
I'm going to take a long, hard look at myself on Victory Road. I'm going to think about what I can do and who I can become... Visit me sometime, if you want. We'll have a battle like old times."
At Victory Road
Before first post-game battle
"<player>, it's difficult, isn't it? When you confront yourself, you have to notice things about yourself that aren't too flattering..."
"I guess that's that. OK, <player>! Accept this Pokémon battle!"
Before subsequent battles
"Oh, you showed up, <player>. In order to surpass myself up to this point, and to beat a purely strong Pokémon Trainer such as yourself, I'm challenging you to a Pokémon battle!"
After first move
"I know all my strengths and weaknesses now. Soon, I will also know all yours!"
Sending out last Pokémon
"It's not over yet. My Pokémon are with me!"
Last Pokémon on low health
"I believe in my Pokémon's strength, so I don't lose my calm."
After defeat
"Thank you! I saw what was missing in me."
"I'll keep battling many Trainers and Pokémon like this, and if I can learn what kind of person I am, it will open up my path. I'm sure this path will lead me to become the person I'm meant to be. Pokémon will always be with you and me as we go down our own paths. Our important friends, Pokémon...
Cheren appears as a character in Pokémon Adventures.
Be a Master!! Pokémon BW
Cheren is friends with both Monta and Bianca, he is very knowledgable about Pokémon, which Monta dislikes. Anywhere Monta slips up he won't hesitate to tell him the right way. He first appears with Bianca when Monta is attempting to capture a wildPatrat and Watchog. Monta is just about to capture the Watchog which Cheren tells him that it is not the right way. He explains to Monta to remember that when two Pokémon come out at the same time, one should knock out the one they don't want before they can get the one that they do want. Cheren suddenly decides for all of them to take their Pokémon journey together, which a man on his bike overhears. He starts insult them making him and Monta angry.
He uses Tepig in a double battle with Monta's Snivy against a Bike Gang King's Braviary, it looks like they were about to lose, but they uses a combination attack which Cheren thinks of, fainting Braviary. Cheren battles Monta in PBW02 using his Tepig, Pansage and Basculin against Monta's Snivy, Panpour and Roggenrola. He starts off with a lecture about triple battles. With his great knowledge of triple battles he gives Monta a hard time, but is eventually defeated.
Cheren's Tepig is well trained and has a type advantage over Monta's Snivy. It was first used in a Double battle with Snivy against the Bike Gang King's Braviary. After Snivy tries a Vine Whip which hardly does any damage, he goes in for a fire attack which hardly does any damage too. Tepig is then sent flying with Peck. It goes in with a Fire Pledge with Grass Pledge creating the combination needed to defeat Braviary.
It battles Monta in PBW02 with Pansage and Basculin against Monta's Snivy, Panpour and Roggenrola. It starts off with an Ember on Snivy, before taking a hit for Basculin by switching places with it, not hurting it much. But seconds later, Panpour uses Surf fainting it.
Cheren's Basculin was first seen in a battle against Monta's Snivy, Panpour and Roggenrola with Tepig and Pansage. It is about to get hit by Snivy's Vine Whip but switches places with Tepig. It then gets hit by Panpour's Surf which does not do much damage. But along with Pansage is defeated by a powerful Rock Slide from Roggenrola, fainting it.