You can catch MEWTWO ,not Mewto, at the end of Cerulean cave
you get torchick by migrating from ruby, sapphire, or emerld
you bring it to the scientist at the museum
I don't really know but i think you have to have an Action Replay to get mewto lr you have to transfer it from an older Pokemon
cant cant cant
Because of the acid from "Emerld green" (arsinec)!
Getting Mewto in Emeraldyou have to trade it from firered or leafgreen Answeru can use an action replay. that's what i did. but trading works too.
get Pokemon emerld and mystery gift
I think that's all you can do in the game
back of cerulean cave
mewtwo is in cerulean cave
you can't catch him on sapphire but you can on emerald.
with a master ball