Pokémon ex rule: When your Pokémon ex is Knocked Out, your opponent takes 2 Prize cards.
Blissful Support
Once during your turn, when you play Blissey ex from your hand to evolve 1 of your Pokémon, you may discard all Energy cards attached to any number of your Pokémon and remove all damage counters from those Pokémon.
Energy Absorption
Attach up to 3 Energy cards from your discard pile to Blissey ex.