Mewtwo is deep within the cave. The only move you would need it surf. But If you want to get through it without going back for items, have a Pokemon with rock smash and Strength. It takes awhile to get to him, but you can do it! I've played Firered 3 times, and I'm like a pro at that cave. But when HG/SS came out, I didn't know what to do. Since the newer games have cliffs and mountains ( unlike the old games) I was all confused. Just keep adventuring the cave, you'll find it.
Cerulean cave
cerulean cave Pokemonheartgold/soulsilver catch him with a dusk ball (easier)
mewtwo i believe is in the Cerulean cave, just go down the ladder and i think he is right there
First you have to beat all of the Kanto gyms. After that you go to the Cerulean Cave. At the end of the cave you find Mewtwo.
you find it in the cerulean cave behind cerulean city after you beat all the Kanto gym leaders
You can find Mewtwo in cerulean cave when you go to the Kanto region.
Cerulean Cave. Bottom foor. Next to stairs. Level 70.
You can find Mewtwo in the back of Cerulean Cave.
If you want to catch Mewtwo in Soulsilver , first , beat the elite four, then get all 8 badges in the Kanto region, then you beat red at the top of Mt. silver, after that fly to Cerulean city in kanto, go to route 24 and surf to the cave in cerulean. Deep in that cave is where you find mewtwo!
You can find Mewtwo in the Cerulean Cave.
You can't find Mewtwo in Pokémon Ruby. However, you can find it in another game and then trade. If you'd like to do this, you can find Mewtwo in the Cerulean Cave in the FireRed/LeafGreen game. In other generation games, Mewtwo can also be found in the Cerulean Cave in HeartGold/SoulSilver and in the Unknown Dungeon in X/Y.
Mewtwo is found in cerulean cave.