Mew MODWBSP 8

Does 10 damage times the number of Energy cards attached to the Defending Pokémon.

Choose an evolved Pokémon (your own or your opponent's). Return the highest Stage Evolution card on that Pokémon to its player's hand. That Pokémon is no longer affected by a Special Condition, or anything else that might be the result of an attack (just as if you had evolved it).