kill profeser oak
ANSWER
You probably can't. Another option is trading with a Pokemon game that has mewtwo in it
Mewtwo isn't unlockable in Pokemon Stadium 2. You will need to register it from either Red, Blue, Yellow, Gold, Silver, or Crystal version.
You can't, Mewtwo is not available in Platinum.
You can only get it in Pokemon chaos black version. Its is where mewtwo is instead of mewtwo.
One of my friends told me you can get jirachi at the end of Mt. Moon and I have tried but I can't figure out how to get there. I do believe there is a jirachi in heart gold version because there are sinnoh Pokemon in it and I have found mewtwo. In gold version however, jirachi cannot exist for gold version was made before jirachi was. I wish you luck in finding the legendary jirachi and other Pokemon!
mirgrate or trade from anothher version
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.
If we're talking Pokemon, it's Mewtwo.
Throw a Master Ball at it.
Yes. With the time machine in gold.
You can't you need to trade him from Pokemon red,yellow or blue.
If you can trade Pokemon from crystal version to gold version my guess is yes