is that strange some cool dude in ally strong pokemon?????? pro tip try to buy lots of potions and save coins lots try not to stat on too long drives you crazy:)

Umm.. What do you mean I don't even understand what your saying what cool dude in the ally?

back ally? or are you referring the Mysterious Trainer in dark alley?
Well you only need ghost pokes(preferred golurk/golett) with fly and toxic to defeat 1 mew.
The level of the mew is x10 to your highest level poke in your party.

Ohh my mistake dark ally yeah what dark2203 said but u need them to be strong if not then u never defeat them I could only defeat 1 xD.

Lol! Back alley hahah! Too funny! The Dar Alley. You do not need high level poke as the his poke go up. You need toxic and fly.