You don't, Mewthree is fake.
There is no such Pokemon as Mewthree.
mewthree is a fake pokemon.
Mewthree is simply a hacked Pokemon that does not exist in any Pokemon game. There is no Pokemon named Mewthree. Not officially; it's a hacked Pokemon.
There is no Mewthree
as far as i know there is no such thing as mewthree in Pokemon
Mewthree is fake, REPEAT MEWTHREE IS FAKE >_<
There is no such Pokemon as Mewthree.
No. Mewthree is a fake Pokemon,sorry if Pokemon had a mewthree that would be awesome though.
there is no such thing as mewthree in Pokemon
There's is no such thing as Mewthree.
MewThree is %100 fake.
no mewthree is just a hack