You may discard a Stadium in play.

Choose 1 of your opponent's Pokémon 4 times. (You can choose the same Pokémon more than once.) For each time you chose a Pokémon, do 60 damage to it. This damage isn't affected by Weakness or Resistance. (You can't use more than 1 VSTAR Power in a game.)

VSTAR rule: When your Pokémon VSTAR is Knocked Out, your opponent takes 2 Prize cards.