AttackSevere Poison
Your opponent's Active Pokémon is now Poisoned. Put 8 damage counters instead of 1 on that Pokémon between turns.

Muk is Pokédex #089, generation 1 (Kanto). Muk & Alolan Muk-GX is a Basic TAG TEAM GX Psychic Pokémon with 270 HP.
Muk & Alolan Muk-GX sits at 61/214 in Unbroken Bonds, position 61 of 238. Before it is 60 Zeraora, and after it is 62 Ekans. The set belongs to the Sun & Moon series. It was released on 3 May 2019. The printed size is 214. This checklist is longer, at 238 cards. The listed rarity is Rare Holo GX.
The attack Severe Poison lists no damage number. The cost is Psychic, Colorless, Colorless. Your opponent's Active Pokémon is now Poisoned. Put 8 damage counters instead of 1 on that Pokémon between turns. Poison Absorption is another attack lists 120 damage. The cost is Psychic, Colorless, Colorless, Colorless. If your opponent's Active Pokémon is Poisoned, heal 100 damage from this Pokémon. Nasty Goo Mix-GX is another attack lists no damage number. Your opponent's Active Pokémon is now Paralyzed and Poisoned. If this Pokémon has at least 4 extra Energy attached to it (in addition to this attack's cost), put 15 damage counters instead of 1 on that Pokémon between turns. (You can't use more than 1 GX attack in a game.) Weakness is Psychic ×2. Retreat cost is 4. The card text says: TAG TEAM rule: When your TAG TEAM is Knocked Out, your opponent takes 3 Prize cards.
Muk (#089) has 31 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 Muk 13/62 in Fossil (1999). That card is named Muk, while this one is Muk & Alolan Muk-GX. That card lists 70 HP, and this one lists 270 HP. The rarity there is Rare Holo, and here it is Rare Holo GX. Retreat cost there is 2, and here it is 4. 28 other cards of Muk list a different HP.
The illustrator line reads Mitsuhiro Arita. I count 721 other cards in the catalog with that illustrator.
Unbroken Bonds set binder is where a full Unbroken Bonds set goes. This card fills one slot there. A generation binder holds one card of each species. Muk can fill a slot in Generation 1 binder (Kanto). Themed lists that include this exact card are Mitsuhiro Arita cards and Alolan forms. I still need this card.
Your opponent's Active Pokémon is now Poisoned. Put 8 damage counters instead of 1 on that Pokémon between turns.
If your opponent's Active Pokémon is Poisoned, heal 100 damage from this Pokémon.
Your opponent's Active Pokémon is now Paralyzed and Poisoned. If this Pokémon has at least 4 extra Energy attached to it (in addition to this attack's cost), put 15 damage counters instead of 1 on that Pokémon between turns. (You can't use more than 1 GX attack in a game.)
TAG TEAM rule: When your TAG TEAM is Knocked Out, your opponent takes 3 Prize cards.
Unbroken Bonds, in the Sun & Moon series. It was released on 3 May 2019. The printed size is 214.
61/214. It is entry 61 of 238 in this checklist.
Mitsuhiro Arita. The catalog lists 721 other cards with that illustrator.
Rare Holo GX.
Muk #089, generation 1 (Kanto).
Severe Poison, Poison Absorption (120), and Nasty Goo Mix-GX.