AttackMagnitude
Does 10 damage to each Benched Pokémon (both yours and your opponent's). (Don't apply Weakness and Resistance for Benched Pokémon.)

Camerupt is Pokédex #323, generation 3 (Hoenn). Camerupt is a Stage 1 Fire Pokémon with 90 HP. The card says it evolves from Numel. In this catalog that name is Numel (#322).
Camerupt sits at 36/110 in Holon Phantoms, position 36 of 111. Before it is 35 Aerodactyl δ, and after it is 37 Chimecho δ. The set belongs to the EX series. It was released on May 1, 2006. The printed size is 110. This checklist is longer, at 111 cards. The listed rarity is Uncommon.
The attack Magnitude lists 20 damage. The cost is Colorless, Colorless. Does 10 damage to each Benched Pokémon (both yours and your opponent's). (Don't apply Weakness and Resistance for Benched Pokémon.) Take Down is another attack lists 60 damage. The cost is Fire, Colorless, Colorless. Camerupt does 10 damage to itself. Weakness is Water ×2. Retreat cost is 2.
Camerupt (#323) has 25 other cards in the catalog. Those other cards are in 20 sets. The other printings with a release date run from 2003 to 2026. The earliest other card is Camerupt 4/109 in Ruby & Sapphire (2003). Both list 90 HP. The rarity there is Rare Holo, and here it is Uncommon. Ken Sugimori illustrated that card, and Atsuko Nishida illustrated this one. Retreat cost there is 3, and here it is 2. 23 other cards of Camerupt list a different HP.
The illustrator line reads Atsuko Nishida. I count 408 other cards in the catalog with that illustrator.
Holon Phantoms set binder is where a full Holon Phantoms set goes. This card fills one slot there. A generation binder holds one card of each species. Camerupt can fill a slot in Generation 3 binder (Hoenn). I still need this card.
Does 10 damage to each Benched Pokémon (both yours and your opponent's). (Don't apply Weakness and Resistance for Benched Pokémon.)
Camerupt does 10 damage to itself.
Holon Phantoms, in the EX series. It was released on May 1, 2006. The printed size is 110.
36/110. It is entry 36 of 111 in this checklist.
Atsuko Nishida. The catalog lists 408 other cards with that illustrator.
Uncommon.
Camerupt #323, generation 3 (Hoenn).
Magnitude (20) and Take Down (60).