Gyarados is Pokédex #130, generation 1 (Kanto). Gyarados is a Stage 1 Water Pokémon with 120 HP. The card lists level 49. The card says it evolves from Magikarp. In this catalog that name is Magikarp (#129).
Gyarados sits at 26/123 in Mysterious Treasures, position 26 of 124. Before it is 25 Glalie, and after it is 27 Kricketune. The set belongs to the Diamond & Pearl series. It was released on August 1, 2007. The printed size is 123. This checklist is longer, at 124 cards. The listed rarity is Rare.
Dragon DNA is listed as Poké-Body. Gyarados can use any attack from its Basic Pokémon. (You still have to pay for that attack's Energy cost.) If Gyarados uses any attack from its Basic Pokémon, that attack does 30 more damage to the Defending Pokémon (before applying Weakness and Resistance). The attack Enrage lists 80 damage. The cost is Water, Water, Colorless, Colorless. Flip a coin until you get tails. For each heads, choose 1 card from your opponent's hand without looking and discard it. If the first coin is tails, Gyarados is now Confused. Weakness is Lightning +30. Resistance is Fighting -20. Retreat cost is 3. The flavor text reads "Once it appears, its rage never settles until it has razed the fields and mountains around it."
Gyarados (#130) has 56 other cards in the catalog. Those other cards are in 38 sets. The other printings with a release date run from 1999 to 2025. The earliest other card is Gyarados 6/102 in Base (1999). That card lists 100 HP, and this one lists 120 HP. The rarity there is Rare Holo, and here it is Rare. 56 other cards of Gyarados list a different HP.
The illustrator line reads Mitsuhiro Arita. I count 721 other cards in the catalog with that illustrator.
Mysterious Treasures set binder is where a full Mysterious Treasures set goes. This card fills one slot there. A generation binder holds one card of each species. Gyarados can fill a slot in Generation 1 binder (Kanto). Themed lists that include this exact card are Mitsuhiro Arita cards. I still need this card.
Gyarados can use any attack from its Basic Pokémon. (You still have to pay for that attack's Energy cost.) If Gyarados uses any attack from its Basic Pokémon, that attack does 30 more damage to the Defending Pokémon (before applying Weakness and Resistance).
Flip a coin until you get tails. For each heads, choose 1 card from your opponent's hand without looking and discard it. If the first coin is tails, Gyarados is now Confused.
Once it appears, its rage never settles until it has razed the fields and mountains around it.
Mysterious Treasures, in the Diamond & Pearl series. It was released on August 1, 2007. The printed size is 123.
26/123. It is entry 26 of 124 in this checklist.
Mitsuhiro Arita. The catalog lists 721 other cards with that illustrator.
Rare.
Gyarados #130, generation 1 (Kanto).
Enrage (80).