Ditto

Card Number | Rarity: 108/149 | Holo Rare
Card Type | HP | Stage: Colorless | 70 | Basic
Card Text: Transform – During your turn (before your attack), you may put a Basic Pokemon from your hand on top of this Pokemon. (This does not count as playing that Pokemon or evolving.) This Pokemon is now that Pokemon. (Any cards attached to this Pokemon, damage counters, Special Conditions, turns in play, and any other effects remain on the new Pokemon.) (Ability)
Weakness | Retreat Cost: Fx2 | 1