Board Thread:General Discussion/@comment-27239499-20151125154454

As we know mewthree is a psychic pokemon, so you can use dark ghost or bug pokemons to beat them up easily. It can take only one pokemon to beat all the clones like i did it only taked me a lvl 90 cofagrigus  now the strategie :

First, get a team of dark or ghost pokemons , easier for you get 2 cofagrigus in your team lvl 85-95 as they have good moves ( protect , ominous wind , shadow ball and any other move it dont matter only thos three are important). Now when the battle begins your first pokemon will be cofagrigus with ominous wind as it have a chance to buff all stats and shadow ball it do more dmg and protect when you can. Dont worry your pokemon will not faint as it will gain lots of levels and replenish hp most the time as mewthree will give lots of exp.

By that you will beat all 27 clones with one pokemon and the rest of the team is for emergency :P

Good luck :) 