Heatran-GX

Once during your turn, when this Pokémon moves from your Bench to become your Active Pokémon, you may move any number of Energy from your other Pokémon to it.

Hot Burn GX

50x

This attack does 50 damage times the amount of Energy attached to this Pokémon. (You can't use more than 1 gx_atk attack in a game.)