Island of the Giant Pokemon - S1-E17
Other mistake: When Ash wakes up on the beach, part of the sides of the hat overlaps the front. (00:01:53)
Island of the Giant Pokemon - S1-E17
Other mistake: When Jessie says she cannot stand roller coasters, part of the background is coloured in like her hair. (00:17:26)
Island of the Giant Pokemon - S1-E17
Other mistake: When Ash and his friends are about to hit the Zapdos robot, its body is missing, and shortly after, Pikachu's cheek pouches disappear. (00:18:42)
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.