Originally Posted by Fat 420
During your turn, you may play a Basic Pokemon from your hand onto this Pokemon. This Pokemon is treated as that Basic Pokemon. (Any cards, damage counters, conditions, and effects on this Pokemon are transferred to the Basic Pokemon.)
Someone tell me what the point of this is...
My guess is that ditto uses the basic pokemon as a shield, so if it is KO'd you discard the basic pokemon instead of ditto but keep stuff like energy cards attached to ditto instead. At least that would make it useful .__.