Mewtwo is not in the game itself you will have to transfer it over.
trade
it is not one of the ancients you can catch
Throw a Master Ball at it.
you cant find him unless you have a cheat or you trade him
No but you can transfer from Leafgreen,Firered to HeartGold,SoulSilver then trade to Black,White!
No you can't. you need to trade from another game.
yes,mewtwo is in Pokemon dimond/pearl
You can't get Mewtwo in Pokemon Pearl.
how do you catch a mewtwo on Pokemon platinum
if you have it on HG, SS, Diamond, Pearl or Platinum yes
No sorry...but you can get it from mystery gift for February 12 to Febuary 26.
it is not in an episode it is in Pokemon the movie mewtwo strikes back