Gureggru of the Mysterious Gym! : Season 10 Episode 8

Continuing on their way through the Sinnoh region, our Heroes come across a budding trainer named Minnie and her Scizor. She explains that she's looking for a new Gym called the Powerzone Gym, which is reputed to take any losing Pokémon under their wing and 'train' them to become stronger. The Powerzone Gym is, in truth, a phony Gym run by Team Rocket to steal their losing opponents' Pokémon when they leave them at the Gym to be 'trained'. So when our Heroes show up looking to challenge the Gym, the thought of stealing Ash's Pikachu and Minnie's Scizor is too tempting...