Mewtwo isn't on Gold, Silver, or Crystal, sorry :(
It will be in the remakes, and so will the legendary birds.
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
You can catch MEWTWO ,not Mewto, at the end of Cerulean cave
you can`t YOU HAVE TO TRADE IT BETWEEN GOLD AND SILVER CATCH MEWTO IN GOLD AND THEN TRADE IT TO SILVER I HOPE I HELPED YOU :P FROM LOLPICKET
no
PIKACHU
trade it
mewto
Cerulean Cave.
back of cerulean cave
mewtwo is in cerulean cave
you cant
the best Pokemon are mewto and the rarest Pokemon ever mew.