Sing! Pokémon Trick House!! - S6-E39
Continuity mistake: At the beginning of the episode, May's bandanna changes from white with a red lining to red with a white lining. This also happens after the King of Tricks falls into the river. (00:00:02 - 00:11:28)
Sing! Pokémon Trick House!! - S6-E39
Continuity mistake: When Ash tells Corphish to use Crabhammer, his bag disappears. (00:17:24 - 00:18:19)
Sing! Pokémon Trick House!! - S6-E39
Continuity mistake: When Seviper and Cacnea are affected by Screech, the green spikes on Cacnea turn yellow. (00:18:04)
Answer: He is a good guy but just found himself in a bad situation when he worked for Lysander. He didn't want him to harm Ash and his Pokémon when he was trying to get the special bond between Ash and his Greninja to work. He does leave Lysander and go back to being a good person.