You'll need to trade for it.
You'll need to trade for it or use the GameShark.
U can't in heart gold but u can catch mewtwo
i have a mewtwo & a Jiggalypuff .. did you find out how much they are worth ??
You can find Mewtwo in the Cerulean Cave.
you cant catch mewtwo in Pokemon platinum peral diamond you can in Pokemon heart gold and solsilver in canalave cave
Mewtwo is found in cerulean cave.
It's impossible to find Mewtwo in Platinum.
Yes. With the time machine in gold.
You can't you need to trade him from Pokemon red,yellow or blue.
Mewtwo is at level 70 when you find it on leaf green.
you cant catch mewtwo in Pokemon emerald. to get it you must trade with either Pokemon firered or leafgreen.
Mewtwo can be found in Mahogany Town where Pryce is.