Weezing

Very rarely, a sudden mutation can result in two small Koffing twins becoming conjoined as a Weezing.

Mixin' Toxin: Your opponent's Active Pokémon is now Confused. Attach a Darkness Energy card from your discard pile to this Pokémon.

Smog Burst (20+): This attack does 20 more damage for each Darkness Energy attached to all of your Pokémon.