Battle Frontier
- Main article: Battle Frontier
This is a fun place to go if you want to show off your battling skills, and you can purchase valuable items with Battle Points you've won. This is mainly a place to have fun and practice your skills. There is an old man in the house north of the Pokémon Center that can check the IVs of your Pokémon, if you're into that sort of thing. There is also a Level 40 Sudowoodo that people have mistaken for a tree. If you water it with the Wailmer Pail, it will attack and you can choose to capture or defeat it. Note that the Battle Frontier is for extremely skilled Trainers, who can get long streaks. That is the main purpose of most facilities, to train you not to lose.
Salon Maiden Anabel's Silver Symbol challenge
Salon Maiden Anabel's Gold Symbol challenge
Palace Maven Spenser's Pokemon Silver Symbol challenge
Palace Maven Spenser's Gold Symbol challenge
Spenser also has a Dusclops and Azurill, but they didn't participate in battle. Sprites of them are seen as Spenser gets ready for his battle with the player.
Factory Head Noland's Silver and Gold Symbol challenge
Like the player, he uses rental Pokémon. Therefore, all of his Pokémon are random for both the Gold and Silver Symbols, so he can use any Pokémon except for those that are not admissible in the Battle Frontier; these include Mewtwo, Mew, Lugia, Ho-Oh, Celebi, Kyogre, Groudon, Rayquaza, Jirachi, and Deoxys.
Pyramid King Brandon's Silver Symbol challenge
Pyramid King Brandon's Gold Symbol challenge
Dome Ace Tucker's Silver Symbol challenge
Dome Ace Tucker's Gold Symbol challenge
Arena Tycoon Greta's Silver Symbol challenge
Arena Tycoon Greta's Gold Symbol challenge
Pike Queen Lucy's Silver Symbol challenge
Pike Queen Lucy's Gold Symbol challenge
Weather Institute
There is a meteorologist here that has found unusual weather patterns. On certain Routes, there will be a downpour or unusually bright sunlight. Routes with unusual weather are where either Terra Cave or Marine Cave will appear. The caves are where Groudon and Kyogre await, respectively. But you have to get to the Route that the cave is on very quickly. If you don't, the cave will vanish and its counterpart will be available instead! Before you start chasing these miraculously teleporting caves, keep in mind that Kyogre and Groudon are Level 70 and extremely powerful!
Marine Cave
Marine Cave can appear on the following routes, depending on the scientist's indication of unusually heavy rain:
When you arrive at the route the scientist indicated, you must find and dive into a small dive square somewhere on the route. Resurface, enter the cave there, and find Kyogre in a pool at the back. It is stationary and will not disappear, so don't worry about leaving the cave to return later if you feel you can't fight it yet. You can even enter battle with it and then run away, and it will still be there. (Don't defeat it, however, unless you are going to trade someone for it or don't plan on capturing it at all.)
Terra Cave
Terra Cave can appear on the following routes, depending on the scientist's indication of unusually bright sunlight:
When you arrive at the route the scientist indicated, you must find the cave bathed in bright sunlight on the route. (On Route 104, you will need Waterfall to access it.) Enter the cave and find Groudon in a pool of lava at the back. It is stationary and will not disappear, so don't worry about leaving the cave to return later if you feel you can't fight it yet. You can even enter battle with it and then run away, and it will still be there. (Don't defeat it, however, unless you are going to trade someone for it or don't plan on capturing it at all.)
Catching the Regis
Note: The Regis can be caught any time after you have seven Gym Badges.
These interesting creatures are considerably easier to catch than Kyogre or Groudon because they are each only Level 40. Each one is in a tiny cave on a different route, accessible only after the Sealed Chamber's puzzle has been solved.
Unlocking the Sealed Chamber
You will need Surf, Dive, a Relicanth, a Wailord, and a Pokémon knowing Dig to successfully open the Sealed Chamber. A Relicanth can be caught in underwater patches of seaweed, and Wailord evolves from Wailmer at Level 40 and is also extremely rarely found on Route 129. (Evolving Wailord from Wailmer is much easier than trying to find a wild one, since it has a 1% encounter rate.)
On Route 134, there is a certain spot where you can use Dive. Dive there, and once you're underwater, head through the door and continue traveling south to reach a strange inscription. this inscription is coded in Braille. At the exact spot in front of the inscription, use Dive again. You will now be in a mysterious cave filled with mounds of earth. Position Wailord in the first slot of your party and Relicanth in the sixth. At the north end of the cave, there is another inscription. Use Dig right in front of it to open the door to the next room. In the second room, read the inscription in the northern part of the room and there will be an earthquake! The Regis are now unlocked.
Regice
Regice awaits in the Island Cave, accessible by Surf on Route 105. This cave also has a puzzle, but it's easy. Following the braille inscription's directions ("Stay close to the wall. Run around one lap."), run counterclockwise once around the the inside of the cave, staying as close to the wall as possible. If you do it right, the door will open.
Before you talk to Regice to start the battle, make sure that you have 45 or more Ultra Balls with you. It will take 10, 20, 30, or maybe even 40 tries to catch this Pokémon. If you think you're ready, save your game and then talk to Regice. (Prepare for some interesting battle music.)
Regice is weak to Fire-, Steel-, Rock-, and Fighting-type moves. Don't take it lightly because of all these weaknesses— its defensive stats are massive, with Special Defense in particular being truly astounding. The only one of its attacks you need to be wary of is Icy Wind. With Regice's abysmal Attack, Superpower and AncientPower won't do much. Get its HP down to red and then keep chucking Ultra Balls until you catch it. If something goes wrong, like if you accidentally knock Regice out or it knocks itself out with Struggle, simply turn off your game (if you saved beforehand as instructed) and everything will be OK again.
Regirock
Regirock awaits in the Desert Ruins of Route 111's desert. You will need Rock Smash. This braille inscription says, "Left, left, down, down. Then, use Rock Smash." Read the inscription and take two steps west and two steps south. Then, use Rock Smash and the door will open. As with Regice, before you start the battle, make sure that you have 45 or more Ultra Balls with you. It will take 10, 20, 30, or maybe even 40 tries to catch this Pokémon. If you think you're ready, save your game and then talk to Regirock.
Regirock is weak to Fighting-, Ground-, Grass-, Steel-, and Water-type moves. Use a supereffective move or two to get Registeel's HP down to under half, and then use normally effective or "not very effective" attacks to gets its HP down to red. Then, throw Ultra Balls until you catch it, making sure to watch out for Rock Throw, Superpower, and AncientPower! Regirock's base Attack of 100 (which can boost with Curse) can be a real threat. Don't use Pokémon weak to Rock or Fighting in this battle unless they are extremely high-leveled. If things go wrong, turn off the power and things will be OK again. Always save beforehand when attempting to capture Legendary Pokémon unless you're using a Master Ball.
Registeel
Registeel awaits in the Ancient Tomb on Route 120. You will need Flash. The inscription reads "Those who inherit our will, shine in the middle." this time. What you need to do is stand in the center of the cave and use Flash. If you do it right, the door will open. You know the drill— just like with the other two Regis, first make sure that you have 45 or more Ultra Balls with you, then save your game and then talk to Registeel.
Registeel is weak to Fighting-, Ground-, and Fire-type moves. Keep in mind that its Defense and Special Defense are quite good. Use a supereffective move or two to get Registeel's HP down to under half, and then use Electric-type or Water-type attacks to gets its HP down to red. Then, throw Ultra Balls until you catch it. (Remember, if you mess up in some way, turning off the power will fix everything since you saved the game beforehand.)
Now that you've caught all the Legendary Pokémon in the game, there aren't any official quests left, except completing the Pokédex! With 386 Pokémon in this game, it'll be harder than it was in the past two generations, and you'll need to trade with other games to get them all, but completing the National Pokédex is an achievable goal. You can also rematch the Gym Leaders and perfect your skills at the Battle Frontier. This concludes the Emerald walkthrough!
