AttackSwing Around
Flip 2 coins. This attack does 20 damage plus 20 more damage for each heads.

HS—Unleashed is a set in the HeartGold & SoulSilver series. It was released on May 12, 2010. The printed size is 95. This checklist is longer, at 96 cards. Onix is 57/95, in position 57 of 96 on this checklist. Before it is 56 Onix, and after it is 58 Poliwag. The listed rarity is Common.
Onix is a Basic Fighting Pokémon with 90 HP. In the Pokédex this is Onix (#095), generation 1 (Kanto). The card lists Steelix, Steelix (#208) under evolves to.
Masakazu Fukuda illustrated this card. The same name is on 471 other cards in the catalog.
Onix (#095) has 29 other cards in the catalog. Those other cards are in 28 sets. The other printings with a release date run from 1999 to 2025. The earliest other card is Onix 56/102 in Base (1999). Both list 90 HP. Both list the rarity Common. Ken Sugimori illustrated that card, and Masakazu Fukuda illustrated this one. 22 other cards of Onix list a different HP.
The attack Swing Around lists 20+ damage. The cost is Colorless, Colorless, Colorless. Flip 2 coins. This attack does 20 damage plus 20 more damage for each heads. Weakness is Grass ×2. Retreat cost is 3. The flavor text reads "It twists and squirms through the ground. The thunderous roar of its tunneling echoes a long way."
I keep a set binder for HS—Unleashed, meant to hold every card of that set. This card is one slot in the HS—Unleashed set binder. 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 2 coins. This attack does 20 damage plus 20 more damage for each heads.
It twists and squirms through the ground. The thunderous roar of its tunneling echoes a long way.
HS—Unleashed, in the HeartGold & SoulSilver series. It was released on May 12, 2010. The printed size is 95.
57/95. It is entry 57 of 96 in this checklist.
Masakazu Fukuda. The catalog lists 471 other cards with that illustrator.
Common.
Onix #095, generation 1 (Kanto).
Swing Around (20+).