you MUST have a gba slot and migrate mewtwo from the older games it is impossible without cheating or hacking to catch mewtwo in D/P.
You can't catch mewtwo in Pokemon diamond. It's better if you use Action replay code.
You can't catch Mewtwo in Pokemon Diamond and pearl and also platinum. But you can catch Mewtwo in heartgold and soul silver
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 cant catch mewtwo in Pokemon platinum peral diamond you can in Pokemon heart gold and solsilver in canalave cave
in a land on water in a land on water
You can't catch Mewtwo in-game in Pokemon Diamond.
Mewtwo is not obtainable in Pokemon DPPt. Trade it over from another game or AR.
No two Pokemon make mewtwo ,you must catch it in firered or leafgreen and if you want you can migerate it to diamond or pearl.
you get a gba game game boy advance Pokemon game that has mewtwo in it and beat him and catch him then you got to beat diamond and go to pal park and but that game in the lower slot and catch him in one shot from yours truly
Palkia, Lugia, Dialga, Deoxys, Mewtwo, and Mew
You can not catch mewtwo in the wild on pokemon diamond, you can only get it by trading with someone on the GTS or someone you know. The other way is by pal parking the pokemon from fire red or leaf green to your game.
Its impossible to actually catch one in diamond But you can transfer it from fir red or leaf green or you can go to the GTS in jubilife city if you have seen mewtwo in your pokedex