A Corphish Out of Water - S6-E24
Continuity mistake: When Ash tells Corphish to use Crabhammer, its pink mouth turns cream-coloured like its underbelly. (00:09:15)
A Corphish Out of Water - S6-E24
Continuity mistake: When Ash and May are eating breakfast, they do not have their gloves on, but after Team Rocket recites their motto, they appear on them. (00:04:26)
A Corphish Out of Water - S6-E24
Continuity mistake: When Corphish knocks Ash into the air, its pincer turns completely red. (00:01:15)
A Corphish Out of Water - S6-E24
Continuity mistake: When Ash is first surprised, Taillow disappears briefly. (00:00:45)
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.