Yadon's Comprehension! Satoshi's Comprehension! - S5-E35
Continuity mistake: When Team Rocket responds after first being surprised by Madeleine, Jessie's right hand is lowered, but in the next shot, it is raised. (00:04:44)
Natio's Big Prediction! - S5-E25
Continuity mistake: In "Dues and Don'ts," when the Pokédex provided facts on Delibird, the portion below the light was red, but in this episode, it is grey. (00:03:29)
Balkie and the Karate King Nobuhiko! - S5-E24
Continuity mistake: In "Dues and Don'ts", when the Pokédex gives facts on Delibird, the border around the screen is red, but when Ash uses it in this episode, the border is grey. (00:01:37)
Fake Okido! Pokémon Senryu Confrontation!! - S5-E36
Continuity mistake: In the first shot after the intro, Ash's left hand is behind his cup, but in the next shot, it is in front of it. (00:01:24)
Asagi Gym! Vs Haganeil!! - S5-E15
Continuity mistake: When Jasmine says that she will not go easy on Ash, Ash's bag is present from the rear view, but in the following front view, it disappears. (00:06:46)
Set Out to the Sea! Line of Chonchie!! - S5-E3
Continuity mistake: In "Around the Whirlpool", when Ash uses his Pokédex, the top button like a line is five millimetres wide and ten millimetres long, but when Ash uses it in this episode, the button is one millimetre wide and five millimetres long. Also, the end of his left thumb and index finger are entirely covered by the Pokédex, but in the next shot, they are not. (00:01:47)
A Chain of Whirlpool Islands! A Renewed Challenge!! - S5-E1
Continuity mistake: When Marius says, "Why don't we give these kids a chance to rest up a bit after the experience they've just had?" his left arm is bent to the right, but in the next shot, it is bent upward. (00:07:52)
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.