Pokémon FireRed and LeafGreen/Cerulean Cave

'The strongest Pokemon in the game now await you within Cerulean Cave. Prepare lots of healing items, a lot of Ultra Balls and heal up your Pokemon before you tackle this difficult challenge!'



Cerulean Cave is the final proving spot for the most advanced of trainers. Located north of Cerulean City, you must surf to reach the entrance.

You cannot obtain access to the cave until you beat the Elite Four, and deliver Celio the Ruby and Sapphire gems to allow for free trade. Within you will find the strongest wild Pokemon in the game, including the greatest of them all: !!!

Cerulean Cave 1st Floor


Feel free to battle the powerful Pokemon here and pick up the items, but if you want to reach Mewtwo as soon as possible, you must reach the stairs at the middle of the map to access the right route.

Items

 * Max Elixir: Near the center
 * Full Restore: Southwest corner of the map
 * Nugget: Northwest corner of the map
 * Ultra Ball (hidden): near the Nugget

Cerulean Cave 2nd Floor


You will find yourself in a maze, but if you entered this area from the ladder previously indicated, you should have a direct (but difficult) path to the ladder located in the northwest corner of the area. Go up this ladder to head directly for Mewtwo.

Items

 * Full Restore: Against the eastern side of the zone (requires Rock Smash to access)
 * PP Up: Near the southwest corner (requires Rock Smash to access)
 * Ultra Ball: Near the southeast corner (requires Rock Smash to access)

Cerulean Cave Basement


If you have been following the previous instructions you should have exited back to the 1st Floor, with one ladder directly north from you, and accessing it should have led you here. Head west and then walk through the ledges towards the small lake. Surf your way directly to your final destination!

is a level 70 Psychic Pokémon and considered to be the strongest Pokémon in FireRed/LeafGreen. You can expect Mewtwo to know the moves, , , and.


 * Tips:
 * As always, before tackling a Legendary Pokemon, SAVE YOUR GAME
 * Try to paralyze Mewtwo with Electric or Grass moves (such as or ) before Mewtwo uses Safeguard, then weaken Mewtwo down to red health.
 * Mewtwo will use Recover when it is weakened (it makes for quite a hassle as the move has 20 PP).
 * When you finally manage to get Mewtwo's health down to red, throw Ultra Balls. Bringing a minimum of 50 is recommended.
 * After a lot of turns have past, start using Timer Balls.
 * Expect this battle to take a long time, so be patient and eventually Mewtwo will surrender to you.

Exit with an Escape Rope if you don't want to make the trek back. You have obtained the greatest Pokemon of all!

Items

 * Max Revive: In the northeast corner
 * Ultra Ball: In the middle of the center of the area

Capturing a Legendary Beast
After delivering the Ruby and Sapphire to Celio, one of the Legendary Beasts will be available for capture, running in the wild grass somewhere in Kanto. They will not appear in your map until you have met them once. After that, be sure to consult your Map to determine whether your Beast is present near you.

Which of the Beasts you'll be able to capture is determined by your starter Pokemon. If you chose Bulbasaur, will roam Kanto. If you chose Charmander, will be available. If you chose Squirtle, is your challenge.


 * Tips
 * To find the Beast quickly, head to an area in Kanto with easy access to a PokeMart, such as Vermillion City. Buy a good number of Repels and place a speedy Pokemon Level 40-49 in the first position. Head into a zone with tall grass and activate a Repel. Walk around the tall grass and try to start a battle. If no battle starts by the time the Repel expires, exit and re-enter the zone. This will reset the Beast's position on the map. Repeat as necessary until you meet the Beast!
 * After you meet the Beast, use your Master Ball immediately!
 * If for some reason you do not have a Master Ball (perhaps used up with Mewtwo), then attack with your Pokemon and do some damage. Keep re-encountering the Beast in the manner previously outlined and chip away at its health until red. Use moves such as or  to increase your chances as well. Use lots of Ultra Balls and hope for the best!
 * Be warned that and  and are bugged. If you use a move or ability to prevent the Beast from fleeing such as  or, this will force it to respond with , and after it does, it will run away NEVER to be seen again! Do not use this strategy or say goodbye to your Beast forever!

The Final Challenge
Congratulations! You've acquired the Legendary Beast! Now that you have concluded all the quests that Kanto has to offer, head back to Seven Island or Cerulean Cave and train your Pokemon for your final challenge. The Elite Four are back and ready for a rematch with you!