yes,mewtwo is in Pokemon dimond/pearl
Action replay.
mewtwo has to be with you
By cheating.
You can't catch mewtwo in Pokemon diamond. It's better if you use Action replay code.
No migrate him from firered or leafgreen to get him.
You can't catch mewtwo in Pokemon diamond because its not available in the game. if you want it you either get it by a friend or a wifi event which i seriouscly doubt.
you can get it from fire red in cerulean cave in mirgrate it to diamond
Mewtwo is not obtainable in Pokemon DPPt. Trade it over from another game or AR.
you can't, you can only get mewtwo off action replay sorry
you cant catch mewtwo in Pokemon platinum peral diamond you can in Pokemon heart gold and solsilver in canalave cave
you can't Mew and Mewtwo are two completely different pokemon. Mewtwo is accually a clone of the original Mew. So... no, you can't evolve Mew into Mewtwo.