Being a Pokemon Master means catching all the pokemon. Of course, this would mean catching all the pokemon in the current game, so if you have Mewtwo in your game, your quest isn't complete until you HAVE captured him! Also, heads up, if you are playing FireRed or LeafGreen, one of the legendary dogs, Entei, Raikou, or Suicine, is wandering about, and hopefully you will run into it! :D Good luck!
Throw a Master Ball at it.
Well it matters what game you have, if you have Pokemon fire red, you can catch it with a master ball
to catch suicune,mewtwo,raikou and entei
Master Ball
The only sure way to instantly catch any Pokemon is with a Master Ball.
how do you catch a mewtwo on Pokemon platinum
Only if you have a code breaker and the master code for ruby plus the mew and mewtwo code
Try to get a ultra ball
No you can't catch Mewtwo in Pokemon silver, you must trade it from Pokemon yellow.
You can't catch Mewtwo in Pokemon Diamond and pearl and also platinum. But you can catch Mewtwo in heartgold and soul silver
You have 2 beat the game, then go 2 the cave in cerileon city, deep in the cave you will find the ultimate Pokemon known as Mewtwo! TIP: use a master ball or its almost impossible 2 catch it!
Catch 'em all