Continuity mistake: When May asks when she and her friends will be stopping for lunch, Ash's bag disappears. (00:00:14)
Continuity mistake: When Max says, "But I haven't even seen one Pokémon yet!" there is dirt, but in the next shot, it disappears. (00:00:21)
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.