AbilityAftermath
When this Pokémon is Knocked Out by damage from an opponent's attack, discard the top 3 cards of your opponent's deck.

Weezing is Pokédex #110, generation 1 (Kanto). Weezing is a Stage 1 Team Plasma Psychic Pokémon with 100 HP. The card says it evolves from Koffing. In this catalog that name is Koffing (#109).
Weezing sits at 58/135 in Plasma Storm, position 58 of 138. Before it is 57 Koffing, and after it is 59 Ralts. The set belongs to the Black & White series. It was released on February 6, 2013. The printed size is 135. This checklist is longer, at 138 cards. The listed rarity is Rare Holo.
Aftermath is listed as Ability. When this Pokémon is Knocked Out by damage from an opponent's attack, discard the top 3 cards of your opponent's deck. The attack Smogbank lists no damage number. The cost is Psychic, Colorless. This attack does 20 damage to each of your opponent's Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.) Weakness is Psychic ×2. Retreat cost is 2. The flavor text reads "Inhaling toxic fumes from trash and mixing them inside its body lets it spread an even fouler stench."
Weezing (#110) has 28 other cards in the catalog. Those other cards are in 24 sets. The other printings with a release date run from 1999 to 2025. The earliest other card is Weezing 45/62 in Fossil (1999). That card lists 60 HP, and this one lists 100 HP. The rarity there is Uncommon, and here it is Rare Holo. Mitsuhiro Arita illustrated that card, and 5ban Graphics illustrated this one. Retreat cost there is 1, and here it is 2. 26 other cards of Weezing list a different HP.
The illustrator line reads 5ban Graphics. I count 1,629 other cards in the catalog with that illustrator.
Plasma Storm set binder is where a full Plasma Storm set goes. This card fills one slot there. A generation binder holds one card of each species. Weezing can fill a slot in Generation 1 binder (Kanto). I still need this card.
When this Pokémon is Knocked Out by damage from an opponent's attack, discard the top 3 cards of your opponent's deck.
This attack does 20 damage to each of your opponent's Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.)
Inhaling toxic fumes from trash and mixing them inside its body lets it spread an even fouler stench.
Plasma Storm, in the Black & White series. It was released on February 6, 2013. The printed size is 135.
58/135. It is entry 58 of 138 in this checklist.
5ban Graphics. The catalog lists 1,629 other cards with that illustrator.
Rare Holo.
Weezing #110, generation 1 (Kanto).
Smogbank.