Haruka vs Shu! The Final Battle!! - S9-E37
Continuity mistake: When Drew tells Flygon to use Steel Wing for a second time, the tip of Flygon's tail changes from green with red borders to red with green borders. (00:05:25)
Revealing mistake: When Aipom runs off with the crown, its tail passes through a wall. (00:07:34)
Audio problem: During the battle with Team Rocket, when Ash tells Pikachu to use Thunderbolt for the first time, Pikachu's voice plays before his mouth moves. (00:16:41)
Gathering the Gang of Four! - S9-E44
Continuity mistake: When Brock says that he is wondering what Officer Jenny will be doing after work, the green collar on his shirt turns skin-colour, making it appear as though his head is disconnected from his body. (00:18:27)
End of a Journey, and Then the Start of a Journey! - S9-E47
Continuity mistake: When the camera pans across Ash's Pokémon when they are eating, Sceptile's lower jaw changes from red to green. (00:02:53)
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.