AttackClamp Crush
Flip a coin. If heads, your opponent's Active Pokémon is now Paralyzed and discard an Energy attached to that Pokémon.

Cloyster is Pokédex #091, generation 1 (Kanto). Cloyster is a Stage 1 Water Pokémon with 100 HP. The card says it evolves from Shellder. In this catalog that name is Shellder (#090).
Cloyster sits at 20/83 in Generations, position 20 of 117. Before it is 19 Shellder, and after it is 21 Krabby. The set belongs to the XY series. It was released on February 22, 2016. The printed size is 83. This checklist is longer, at 117 cards. The listed rarity is Uncommon.
The attack Clamp Crush lists 30 damage. The cost is Water, Colorless. Flip a coin. If heads, your opponent's Active Pokémon is now Paralyzed and discard an Energy attached to that Pokémon. Spike Cannon is another attack lists 30× damage. The cost is Water, Water, Colorless. Flip 5 coins. This attack does 30 damage times the number of heads. Weakness is Grass ×2. Retreat cost is 3. The flavor text reads "Cloyster that live in seas with harsh tidal currents grow large, sharp spikes on their shells."
Cloyster (#091) has 13 other cards in the catalog. Those other cards are in 12 sets. The other printings with a release date run from 1999 to 2023. The earliest other card is Cloyster 32/62 in Fossil (1999). That card lists 50 HP, and this one lists 100 HP. Both list the rarity Uncommon. Kagemaru Himeno illustrated that card, and Masakazu Fukuda illustrated this one. Retreat cost there is 2, and here it is 3. 11 other cards of Cloyster list a different HP.
The illustrator line reads Masakazu Fukuda. I count 471 other cards in the catalog with that illustrator.
Generations set binder is where a full Generations set goes. This card fills one slot there. A generation binder holds one card of each species. Cloyster can fill a slot in Generation 1 binder (Kanto). I still need this card.
Flip a coin. If heads, your opponent's Active Pokémon is now Paralyzed and discard an Energy attached to that Pokémon.
Flip 5 coins. This attack does 30 damage times the number of heads.
Cloyster that live in seas with harsh tidal currents grow large, sharp spikes on their shells.
Generations, in the XY series. It was released on February 22, 2016. The printed size is 83.
20/83. It is entry 20 of 117 in this checklist.
Masakazu Fukuda. The catalog lists 471 other cards with that illustrator.
Uncommon.
Cloyster #091, generation 1 (Kanto).
Clamp Crush (30) and Spike Cannon (30×).