The Red Gyarados - Pokemon Generations (2016)

"That Red Gyarados. It wasn't acting normally. Was it forced to evolve by that mysterious radio wave?" - Lance  'The Lake of Rage' Series 1 Episode 4

Having been forcibly evolved from a Magikarp by electromagnetic waves produced by a radio transmitter underneath Mahogany Town, the Red Gyarados furiously attacked anyone who came near to the Johto Region's Lake of Rage.

 'The Lake of Rage'

Whilst investigating the reports of a wild Gyarados that was acting more violent than any others in the local area, Lance and his Dragonite travelled to the Lake to challenge the Atrocious Pokemon. However upon seeing the Dragon Pokemon, the Gyarados used Dragon Rage, attempting to knock him out of the sky. It was barely shaken by Dragonite's Hyper Beam, used as a distraction to allow it and it's master to make a full retreat. Lance suspected that the strange signal he had been tracking were directly responsible for the rabid nature of Gyarados, leading an attack on a shop in Mahogany Town - a front for Team Rocket and their underground hideout.

After Dragonite destroyed the radio wave transmitter and freed the Electrode from their imprisonment, the Red Gyarados became far more passive.

Lance watched from the shore as it dived away beneath the surface of the lake, giving one final roar before vanishing.

Appearances: Trivia:
 * 1)  'The Lake of Rage' (First and Only Appearance)