AttackCrush
Flip a number of coins equal to the amount of Energy attached to Onix. This attack does 20 damage times the number of heads.

Onix is Pokédex #095, generation 1 (Kanto). Onix is a Basic Fighting Pokémon with 60 HP. The card lists Steelix, Steelix (#208) under evolves to.
Onix sits at 98/147 in Aquapolis, position 98 of 182. Before it is 97 Oddish, and after it is 99 Paras. The set belongs to the E-Card series. It was released on 15 January 2003. The printed size is 147. This checklist is longer, at 182 cards. The listed rarity is Common.
The attack Crush lists 20× damage. The cost is Fighting, Colorless. Flip a number of coins equal to the amount of Energy attached to Onix. This attack does 20 damage times the number of heads. Weakness is Water ×2. Retreat cost is 2.
Onix (#095) has 29 other cards in the catalog. Those other cards are in 27 sets. The other printings with a release date run from 1999 to 2025. The earliest other card is Onix 56/102 in Base (1999). That card lists 90 HP, and this one lists 60 HP. Both list the rarity Common. Ken Sugimori illustrated that card, and Hajime Kusajima illustrated this one. Retreat cost there is 3, and here it is 2. 28 other cards of Onix list a different HP.
The illustrator line reads Hajime Kusajima. I count 206 other cards in the catalog with that illustrator.
Aquapolis set binder is where a full Aquapolis set goes. This card fills one slot there. A generation binder holds one card of each species. Onix can fill a slot in Generation 1 binder (Kanto). I still need this card.
Flip a number of coins equal to the amount of Energy attached to Onix. This attack does 20 damage times the number of heads.
Aquapolis, in the E-Card series. It was released on 15 January 2003. The printed size is 147.
98/147. It is entry 98 of 182 in this checklist.
Hajime Kusajima. The catalog lists 206 other cards with that illustrator.
Common.
Onix #095, generation 1 (Kanto).
Crush (20×).