AbilityRare Metal
All basic Energy cards attached to Steelix provide Metal Energy instead of their usual types.

Skyridge is a set in the E-Card series. It was released on 12 May 2003. The printed size is 144. This checklist is longer, at 182 cards. Steelix is H29/144, in position 179 of 182 on this checklist. Before it is H28 Starmie, and after it is H30 Umbreon. The listed rarity is Rare Holo.
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).
Hikaru Koike illustrated this card. The same name is on 46 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. Both list the rarity Rare Holo. Ken Sugimori illustrated that card, and Hikaru Koike illustrated this one. 29 other cards of Steelix list a different HP.
Rare Metal is listed as Poké-Body. All basic Energy cards attached to Steelix provide Metal Energy instead of their usual types. The attack Squeeze lists 20+ damage. The cost is Metal, Metal, Colorless. Flip a coin. If heads, this attack does 20 damage plus 10 more damage and the Defending Pokémon is now Paralyzed. Metal Tail is another attack lists 40 damage. The cost is Metal, Metal, Metal, Colorless. Before doing damage, you may flip a coin. If heads, this attack does 80 damage. If tails, this attack does nothing. Weakness is Fire ×2. Resistance is Grass -30. Retreat cost is 4.
I keep a set binder for Skyridge, meant to hold every card of that set. This card is one slot in the Skyridge 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.
All basic Energy cards attached to Steelix provide Metal Energy instead of their usual types.
Flip a coin. If heads, this attack does 20 damage plus 10 more damage and the Defending Pokémon is now Paralyzed.
Before doing damage, you may flip a coin. If heads, this attack does 80 damage. If tails, this attack does nothing.
Skyridge, in the E-Card series. It was released on 12 May 2003. The printed size is 144.
H29/144. It is entry 179 of 182 in this checklist.
Hikaru Koike. The catalog lists 46 other cards with that illustrator.
Rare Holo.
Steelix #208, generation 2 (Johto).
Squeeze (20+) and Metal Tail (40).