You can probaly catch him with a ultra ball but I would use the 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
Mewtwo? you need to bring it over from one of the GBA games. i think FireRed and LeafGreen have it. transfer it from one of them into the PalPark and catch it there.
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.
With a master ball.
you can catch mewtwo at cerulean cave
explore around and catch mewtwo.
To get Deoxys, you need the Aurora Ticket from a Nintendo Event. To get Latias, they are in the wild after you beat the Elite Four. To get Mewtwo, you need to trade from LeafGreen or FireRed.
After you catch mewtwo you go and beat the Pokemon league again to go and catch the legendary dogs!!!!!!!!!!