Single Strike Energy (Secret)

This card can only be attached to a Single Strike Pokemon. If this card is attached to anything other than a Single Strike Pokemon, discard this card. As long as this card is attached to a Pokemon, it provides Fighting and Darkness Energy but provides only 1 Energy at a time, and the attacks of the Pokemon this card is attached to do 20 more damage to your opponent's Active Pokemon (before applying Weakness and Resistance).