Anime: Chuck made his sole anime appearance in "Machoke, Machoke Man!" Ash and his friends encountered a man wrestling with a Machoke. Upon following him, they discovered that the man was Chuck, the Gym Leader of Cianwood Gym. Despite being a Fighting-type master, he tires easily due to his somewhat overweight physique. His wife often teases him because of this. He has a positive outlook and is quite emotional, prone to breaking into tears when happy. His battle strategy involves fighting alongside his Pokémon to enhance their focus.
Later, Chuck and Ash battled for the Storm Badge. Ash used Pikachu, who was defeated by Chuck's Poliwrath. Ash then deployed Bayleef, who triumphed over both Poliwrath and Machoke.
It was later revealed that Brawly, the Dewford Town Gym Leader, was once among Chuck's many students.
Manga: Chuck taught Blue martial arts and Pokémon training techniques when the boy was very young.
In his first appearance, Chuck was preparing for a battle against Wayne. He noticed something strange when he found his sandbags and Wayne's jacket slashed, but then he encountered Suicune. With Wayne's help, they figured out that it was responsible for the damage to the jacket and sandbags. They attempted to catch it, but were unsuccessful, just like previous Gym Leaders such as Clair had been.
(Source: Bulbapedia)
