With a master ball.
1. you cant catch mewtwo on ruby emerald or saphire<spelling mistake> you can migrate the mewtwo you catch on leafgreen or firered to migrate to platinum
Lv70
Congrats, you're done with the game. There's really no story after Mewtwo.
mewtwo is in cerulean cave. the cave in in cerulean city, where misty's gym is. mewtwo in hard to catch, though.
you find it deap in cerluean cave
No trade one from firered or leafgreen.
you can catch mewtwo at cerulean cave
explore around and catch mewtwo.
After you catch mewtwo you go and beat the Pokemon league again to go and catch the legendary dogs!!!!!!!!!!
go to the cerulean cave and catch mewtwo
Inside the Cerulean Cave. HMs Required: Surf
articuno zapatos moltres and mewtwo