AttackEarth Rift
This attack does 10 damage to each of your opponent's Benched Pokémon. (Don't apply Weakness or Resistance for Benched Pokémon.) Then, flip a coin. If tails, this attack can't be used during your next turn.

Aquapolis is a set in the E-Card series. It was released on January 15, 2003. The printed size is 147. This checklist is longer, at 182 cards. Steelix is 35/147, in position 35 of 182 on this checklist. Before it is 34 Slowking, and after it is 36 Sudowoodo. The listed rarity is Rare.
Steelix is a Stage 1 Metal Pokémon with 100 HP. In the Pokédex this is Steelix (#208), generation 2 (Johto). The card says it evolves from Onix. In this catalog that name is Onix (#095).
Hajime Kusajima illustrated this card. The same name is on 206 other cards in the catalog.
Steelix (#208) has 33 other cards in the catalog. Those other cards are in 24 sets. The other printings with a release date run from 2000 to 2025. The earliest other card is Steelix 15/111 in Neo Genesis (2000). That card lists 110 HP, and this one lists 100 HP. The rarity there is Rare Holo, and here it is Rare. Ken Sugimori illustrated that card, and Hajime Kusajima illustrated this one. 29 other cards of Steelix list a different HP.
The attack Earth Rift lists 10 damage. The cost is Colorless, Colorless. This attack does 10 damage to each of your opponent's Benched Pokémon. (Don't apply Weakness or Resistance for Benched Pokémon.) Then, flip a coin. If tails, this attack can't be used during your next turn. Iron Smash is another attack lists 50+ damage. The cost is Metal, Metal, Colorless, Colorless. Flip 2 coins. If both are heads, this attack does 50 damage plus 20 more damage. If both are tails, this attack does nothing. If 1 is heads and 1 is tails, this attack just does 50 damage. Weakness is Fire ×2. Resistance is Grass -30. Retreat cost is 4.
I keep a set binder for Aquapolis, meant to hold every card of that set. This card is one slot in the Aquapolis set binder. A generation binder holds one card of each species. Steelix can fill a slot in Generation 2 binder (Johto). I still need this card.
This attack does 10 damage to each of your opponent's Benched Pokémon. (Don't apply Weakness or Resistance for Benched Pokémon.) Then, flip a coin. If tails, this attack can't be used during your next turn.
Flip 2 coins. If both are heads, this attack does 50 damage plus 20 more damage. If both are tails, this attack does nothing. If 1 is heads and 1 is tails, this attack just does 50 damage.
Aquapolis, in the E-Card series. It was released on January 15, 2003. The printed size is 147.
35/147. It is entry 35 of 182 in this checklist.
Hajime Kusajima. The catalog lists 206 other cards with that illustrator.
Rare.
Steelix #208, generation 2 (Johto).
Earth Rift (10) and Iron Smash (50+).