Team Up is a set in the Sun & Moon series. It was released on February 1, 2019. The printed size is 181. This checklist is longer, at 198 cards. Alolan Muk is 84/181, in position 84 of 198 on this checklist. Before it is 83 Alolan Grimer, and after it is 85 Tyranitar. The listed rarity is Rare.
Alolan Muk is a Stage 1 Darkness Pokémon with 120 HP. In the Pokédex this is Muk (#089), generation 1 (Kanto). The card says it evolves from Alolan Grimer. In this catalog that name is Grimer (#088).
Midori Harada illustrated this card. The same name is on 352 other cards in the catalog.
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 Alolan Muk. That card lists 70 HP, and this one lists 120 HP. The rarity there is Rare Holo, and here it is Rare. Mitsuhiro Arita illustrated that card, and Midori Harada illustrated this one. Retreat cost there is 2, and here it is 3. 30 other cards of Muk list a different HP.
Adventurous Appetite is listed as Ability. When you play this Pokémon from your hand to evolve 1 of your Pokémon during your turn, you may look at the top 6 cards of your opponent's deck and discard any number of Item cards you find there. Your opponent shuffles the other cards back into their deck. The attack Gunk Shot lists 80 damage. The cost is Darkness, Colorless, Colorless. Your opponent's Active Pokémon is now Poisoned. Weakness is Fighting ×2. Resistance is Psychic -20. Retreat cost is 3. The flavor text reads "While it's unexpectedly quiet and friendly, if it's not fed any trash for a while, it will smash its Trainer's furnishings and eat up the fragments."
I keep a set binder for Team Up, meant to hold every card of that set. This card is one slot in the Team Up set binder. 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 Alolan forms. I still need this card.