there is no way. cheating is the only way
No. Mewthree is a fake Pokemon,sorry if Pokemon had a mewthree that would be awesome though.
Mewthree cannot be caught in Pokemon Diamond, even with an Action Replay, because it does not exist in the game's data.
Mewthree cannot be caught in Pokemon Pearl. It does not exist in the game's data anywhere.
There is no such Pokemon as Mewthree it is a hacked Pokemon, so consequently it cannot be obtained in Pokemon Diamond.
No, there is no legitimate Action Replay code for Mewthree for Pokemon Diamond.
you cant you have to action replay it
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You can only get Mewthree by hacking it into the Pokemon Pearl ROM. It cannot be obtained legitimately or by using the Action Replay.
There is no way to obtain Mewthree since it doesn't exist.
There is no such thing as a Mewthree, so there isn't an action replay code for it.
There is no code, Mewthree is only a hack.
Here's the fact..MEWTHREE DOES NOT EXIST!!There are only 435 Pokemon at the moment, and they're all known.There is no way to get "him" even with cheats, because he isn't in the game.