Chuck (anime)

Chuck is a Gym Leader appearing in Pokémon: Johto League Champions.

Season 4: Johto League Champions
Chuck made his debut in Machoke, Machoke Man!. He was first seen training with his Machoke first on Defense then on Offense.

He was so teary eyed when he said he was proud of Machoke's power. He then noticed Ash and went drill sergeant forcing him, Misty, Brock and Pikachu to march all the way to the gym.

When they arrived, Chuck was the last one to arrive because he was tired out. His students greeted him as the master and he revealed himself to be the Gym Leader. He says that eating is also part of training, but he can be sensitive about his weight when anyone, especially his wife, calls him "flabby".

Season 5: Master Quest
When Team Rocket stole Ash's badges, Ash remembered his fights with the Johto Gym Leaders, as his Pokémon were responsible for winning those badges.