Welcome to PokéCommunity! Register now and join one of the best fan communities on the 'net to talk Pokémon and more! We are not affiliated with The Pokémon Company or Nintendo.
Alas, I captured them both before knowing this. (They wern't Shiny.) Besides, traded Pokes get more EXP. Points in battle. I can offer an EVed lv 100 Shiny Mewtwo (447 Sp. Attack) for both right away.