Edge's Gyarados

Edge's Gyarados (Japanese: えっじギャラドス Etsuji's Gyarados) is the fifth Pokémon that Edge captured after embarking on his journey, and his sixth overall. He originally belonged to and was traded to Edge for his.

With Misty
Near the entrance to, Gyarados attacks his Trainer, with her defending her. Staryu nearly faints as Edge appears. Edge decides to help with his Bulbasaur. Thanks to the type advantage, Gyarados's doesn't critically injure Bulbasaur. Edge then commands Bulbasaur to use, which drains some of Gyarados's health. However, Gyarados breaks free of Leech Seed due to sheer force, but Bulbasaur and Staryu's combined and, respectively, finally manages to weak Gyarados enough for Edge to use the girl's  and recall the rampaging Gyarados.

With Edge
Gyarados is sent out by Misty to fight against a wild that was attacking Edge underwater. Gyarados manages to distract Dragonite long enough for Misty to safely bring Edge to the surface. Once the two dragons emerge, Dragonite shoots off a, and Gyarados counters back a Hyper Beam of his own. As the smoke clears from the clashing attacks, Dragonite falls back into the waters, defeated. Subsequently, Misty trades Gyarados to Edge in exchange for his since Gyarados knew how to use, which Red accepts. Although Edge was happy to have obtained him, his earlier ferocity quickly gets him isolated from Edge's other Pokémon. When they ran into again, Gyarados was forced to relive some painful memories of his experimentation. Edge had his other Pokémon help him through that traumatic experience and after that, he was broken into the group, resulting in Edge's Pokémon trusting him more.

Personality and Characteristics
At first, Gyarados was very angry and enraged, attacking every nearby person and Pokémon and not calming down for a second. This was as a result of being injected by with a liquid that boosts its powers, although it caused Gyarados immense pain and agony, resulting in its rampage.

After being calmed down and subsequently returned to its original nature, Gyarados proved himself quite friendly and docile, attempting to bond with Edge's other Pokémon, although they were still wary due to their previous encounter, although Gyarados himself was oblivious to this fact, continuing to act friendly towards them.

Like Edge's Eevee, Gyarados developed a slight trauma from his experimentation, going on a temporary fit of rage after re-encountering Team Rocket, though was able to work through it thanks to his Trainer and his teammates.