You can't you need to trade him from Pokemon red,yellow or blue.
you cant catch mewtwo in Pokemon platinum peral diamond you can in Pokemon heart gold and solsilver in canalave cave
You'll need to trade for it.
Yes. With the time machine in gold.
red blue yellow pokemon silver gold crystal
Mew, Mewtwo Moltres, Zapdos, Articuno, and Cyndaquil.
You'll need to trade for it or use the GameShark.
Mew can't be catched in Pokemon heartgold, only mewtwo.
Look up in YuTube how to capture mew Pokemon gold if u wanna catch mew the almighty!!!!!
Mewtwo isn't unlockable in Pokemon Stadium 2. You will need to register it from either Red, Blue, Yellow, Gold, Silver, or Crystal version.
Mewtwo isn't on Gold, Silver, or Crystal, sorry :(It will be in the remakes, and so will the legendary birds.
Mewtwo is not found in the wild in Pokémon Crystal, or Gold or Silver. You will need to trade one over from Red, Blue, or Yellow.
U can't in heart gold but u can catch mewtwo