Myron was a boy with Pancham. However, Team Rocket, disguised as the twerps, approached Myron. Myron, despite his surprise Pikachu flew into air (who was actually James' Inkay), was forced to battle them. When the heroes came, Myron was outraged they came back, but noticed they didn't look the same as Team Rocket.
Pancham is Myron's only known Pokemon. It did not fight back after being attacked twice by the impostor Ash's Pikachu.