Attach PlusPower to your Active Pokémon. At the end of your turn, discard PlusPower. If this Pokémon's attack does damage to the Defending Pokémon (after applying Weakness and Resistance), the attack does 10 more damage to the Defending Pokémon.
PlusPower #084 is a English Pokémon TCG card from the Base Set (Shadowless) set, printed at Uncommon rarity.
Illustration by Keiji Kinebuchi.
Base Set (Shadowless) was released in 1999 as part of the Original Series series.
The Base Set (Shadowless) set page lists every other card in the same expansion in card-number order.