mewto
Genesect has a random nature.
None
You can catch MEWTWO ,not Mewto, at the end of Cerulean cave
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
action replay
Unfortuenetly u cant catch mewto on emerald only on fire red.green and dimond and pearl! SORRY SUCKERS!!!!!!!
PIKACHU
no
Yes
trade it
back of cerulean cave
you can't catch him on sapphire but you can on emerald.