Pokémon Fortune-telling!? Enormous Melee! - S3-E41
Continuity mistake: When the Day Care workers are revealing their true selves, there are two crates in front of the worker, but in the next shot, the one on top disappears while the one on the bottom is no longer in front of her. (00:12:27)
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.