AttackPoisonpowder
The Defending Pokémon is now Poisoned.

Unseen Forces is a set in the EX series. It was released on August 1, 2005. The printed size is 115. This checklist is longer, at 145 cards. Gloom is 58/115, in position 60 of 145 on this checklist. Before it is 57 Gligar, and after it is 59 Hoothoot. The listed rarity is Common.
Gloom is a Stage 1 Grass Pokémon with 70 HP. In the Pokédex this is Gloom (#044), generation 1 (Kanto). The card says it evolves from Oddish. In this catalog that name is Oddish (#043). The card lists Vileplume, Vileplume (#045) and Bellossom, Bellossom (#182) under evolves to.
Kouki Saitou illustrated this card. The same name is on 652 other cards in the catalog.
Gloom (#044) has 25 other cards in the catalog. Those other cards are in 22 sets. The other printings with a release date run from 1999 to 2026. The earliest other card is Gloom 37/64 in Jungle (1999). That card lists 60 HP, and this one lists 70 HP. The rarity there is Uncommon, and here it is Common. Keiji Kinebuchi illustrated that card, and Kouki Saitou illustrated this one. 15 other cards of Gloom list a different HP.
The attack Poisonpowder lists 20 damage. The cost is Grass, Colorless. The Defending Pokémon is now Poisoned. Weakness is Psychic ×2. Retreat cost is 1.
I keep a set binder for Unseen Forces, meant to hold every card of that set. This card is one slot in the Unseen Forces set binder. A generation binder holds one card of each species. Gloom can fill a slot in Generation 1 binder (Kanto). I still need this card.
The Defending Pokémon is now Poisoned.
Unseen Forces, in the EX series. It was released on August 1, 2005. The printed size is 115.
58/115. It is entry 60 of 145 in this checklist.
Kouki Saitou. The catalog lists 652 other cards with that illustrator.
Common.
Gloom #044, generation 1 (Kanto).
Poisonpowder (20).