Gyarados is card #23 of 83 in Generations (2016), a Rare illustrated by Shin Nagasawa. At about $9.41 it is the #40 most valuable card in the set. In a Generations booster it turns up about once every 19 packs. It is one of 57 Gyarados cards printed so far.
1999Base Set
2002Legendary Collection
2006Holon Phantoms
2009Platinum
2013Legendary Treasures
2016BREAKpoint
2017Crimson Invasion
2021Evolving Skies

















See the full Generations card list
An ungraded Gyarados from Generations sells for about $9.41. A PSA 10 is worth more, roughly $47.05 by our estimate, and a PSA 9 around $21.64.
It is a Rare, and it shows up about once every 19 Generations packs.
Shin Nagasawa drew the art for this card.
Yes, as a digital simulator. Holobrook lets you open Generations booster packs in your browser with the set's real pull rates and keep what you pull in a digital binder. No real cards, nothing to buy.