AbilityAqua Lift
If Relicanth has any Water Energy attached to it, the Retreat Cost for Relicanth is 0.

Relicanth is Pokédex #369, generation 3 (Hoenn). Relicanth is a Basic Water Pokémon with 70 HP.
Relicanth sits at 30/110 in Holon Phantoms, position 30 of 111. Before it is 29 Registeel, and after it is 31 Sableye. 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 Rare.
Aqua Lift is listed as Poké-Body. If Relicanth has any Water Energy attached to it, the Retreat Cost for Relicanth is 0. The attack Knock Away lists 20+ damage. The cost is Colorless, Colorless. Flip a coin. If heads, this attack does 20 damage plus 10 more damage. Weakness is Lightning ×2. Retreat cost is 1.
Relicanth (#369) has 15 other cards in the catalog. Those other cards are in 13 sets. The other printings with a release date run from 2004 to 2026. The earliest other card is Relicanth 24/101 in Hidden Legends (2004). That card lists 60 HP, and this one lists 70 HP. Both list the rarity Rare. Kagemaru Himeno illustrated that card, and Mitsuhiro Arita illustrated this one. 13 other cards of Relicanth list a different HP.
The illustrator line reads Mitsuhiro Arita. I count 721 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. Relicanth can fill a slot in Generation 3 binder (Hoenn). Themed lists that include this exact card are Mitsuhiro Arita cards. I still need this card.
If Relicanth has any Water Energy attached to it, the Retreat Cost for Relicanth is 0.
Flip a coin. If heads, this attack does 20 damage plus 10 more damage.
Holon Phantoms, in the EX series. It was released on May 1, 2006. The printed size is 110.
30/110. It is entry 30 of 111 in this checklist.
Mitsuhiro Arita. The catalog lists 721 other cards with that illustrator.
Rare.
Relicanth #369, generation 3 (Hoenn).
Knock Away (20+).