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 Ash tells Corphish to use Crabhammer, its pink mouth turns cream-coloured like its underbelly. (00:09:15)
The Startling Yamirami! - S6-E29
Continuity mistake: When Corphish slices a root, one of its pincers turns completely red. This also happens shortly after when it slices the sandwiches. (00:00:36 - 00:00:58)
The Startling Yamirami! - S6-E29
Continuity mistake: When Ash and his friends eat the sandwiches, May's white skirt turns red like her shirt. (00:01:06)
The Startling Yamirami! - S6-E29
Audio problem: When Ash asks what happened with Corphish, his mouth does not move. (00:15:05)
Haruka! The First Pokémon Contest Challenge!! - S6-E35
Continuity mistake: When Ash suggests that May could check the date for the contest earlier, the buildings on the side change between shots. Also, the left side of his hat constantly changes from red to black. (00:00:03)
Beauty and the Beast!? Dirteng and Joi-san - S6-E37
Continuity mistake: When Nurse Joy walks to the window at the beginning of the episode, her chair is positioned on the second row of tiles from the window while her desk is positioned on that and the first row of tiles from there, but when Ash and friends watch the footage of the shot, Nurse Joy's chair is positioned on the third row of tiles from the window while her desk is positioned on the second and fourth rows of tiles from there. Also, the way Nurse Joy braces when the wind blows changes. (00:04:54)
Sing! Pokémon Trick House!! - S6-E39
Continuity mistake: At the beginning of the episode, May's bandanna changes from white with a red lining to red with a white lining. This also happens after the King of Tricks falls into the river. (00:00:02 - 00:11:28)
Sing! Pokémon Trick House!! - S6-E39
Continuity mistake: When Ash tells Corphish to use Crabhammer, his bag disappears. (00:17:24 - 00:18:19)
Sing! Pokémon Trick House!! - S6-E39
Continuity mistake: When Seviper and Cacnea are affected by Screech, the green spikes on Cacnea turn yellow. (00:18:04)
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.