There are over 300 set icons by now, and nobody is blaming you for not knowing them all
The second set of the new era debuts with booster packs, Elite Trainer Boxes, and more
So before you ditch any Pokmon, its worth checking their IV for battles by using a separate app such as Pokegenie which is available for both Android and iOS
Gyarados has one of the highest HP points in the game and it only costs one evolution to make him tanky
Ankh of Mishra Mishra Mishra's Bauble Mishra's Command Mishra's Domination Mishra's Factory Mishra's Foundry Mishra's Groundbreaker Mishra's Helix Mishra's Juggernaut Mishra's Onslaught Mishra's Research Desk Mishra's Self-Replicator Mishra's War Machine Mishra's Workshop Mishra, Artificer Prodigy Mishra, Claimed by Gix Mishra, Eminent One Mishra, Excavation Prodigy Mishra, Lost to Phyrexia Mishra, Tamer of Mak Fawa
You'd prefer the four bodies of Release the Dogs for Anthem effects like Glorious Anthem which is why this bad boy hits lower on my list