Raichu (Undaunted 83/90)
Poké-POWER Voltage Increase

As often as you like during your turn (before your attack), you may move a Lightning Energy attached to 1 of your Pokémon to Raichu. This power can't be used if Raichu is affected by a Special Condition.

Lightning Lightning Colorless
Mega Thunderbolt

Discard all Energy attached to Raichu.