Single Strike Energy Damage Not Adding Up

JoyfulDigger

I put 4 single strike energy on a Tyranitar V. Each one says it adds 20 damage to the pokemon's attacks it is attached to.

I attacked with him attacked Single Strike Crush (240 damage move) against a Giratina V Star.

My opponent had a Radiant Gardevoir on his bench whose ability reduces damage from your opponents pokemon V by 20.

My attack only did 270 damage. Giratina V Star has 280 hp. I ended up losing the game.

By my calculations it should have been 240+20+20+20+20-20=300 damage.

What am I missing or is it a bug?

Thanks

DoubleCure

Did your opponent active Pokémon had a V Guard Energy attached? it reduces damage by 30 from attacking Pokémon V.

JoyfulDigger

Thanks for responding!

I honestly can't remember at this point though that would fix the math.