My opponent has Unown E attached to his Active Pokemon. I have a Pachirisu active and use Smash Short for 40. My opponent has 2 other Unown E, an Unown A and a Unown G in his or her hand. Do I discard all Unown, only the Unown Es or none of them.
The way it's worded, you wouldn't discard anything from your hand. The effect says "discard any Pokemon Tool cards of the same name", but Unown isn't considered a Tool in your hand.
Unown E is only a tool when attached to an active or another Pokemon. If it is in your hand,on your bench or anywhere else it is a Pokemon. The card is confusing at first. If you read it over several times you will understand the attack.