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)
Continuity mistake: When Ash and Brock head over to the left side of the boat after hearing Max and May from the water, the door to the right of therm has no handle, but in the next shot, it has one. (00:06:00)
Continuity mistake: After Brock places a sticker on a rock, the rock's cracks change between shots. (00:02:46)
Continuity mistake: When Ash asks, "What are you talking about?" the left page May is on goes from having a rectangle that is four centimetres wide to having one that is two centimetres wide. Also, the lights on the ceiling move further apart between shots. (00:00:31)
Try to Study! Pokémon Trainer's School! - S6-E15
Continuity mistake: When Tommy quizzes Max on his information on Pokémon, a girl with red hair in a ponytail with white shirt is sitting behind him, but in the next shot, her shirt is yellow and has pink hair without a ponytail. Also, Max's body is facing the front of the classroom with his head not turned to Tommy, but in the next shot, his body faces to the left with his head facing Tommy. (00:07:00)
Taming of the Shroomish - S6-E9
Continuity mistake: When Max finds a Shroomish, Pikachu's left forepaw is on Ash's collar, but in the next shot, it is on his left sleeve. (00:04:22)
Try to Study! Pokémon Trainer's School! - S6-E15
Revealing mistake: When Ash says, "No problem!" in response to Roxanne asking if it is all right to postpone his match at the Rustboro Gym, Pikachu's mouth duplicates. Also, Ash and Roxanne go from being 90 centimetres from each other to being 30 centimetres away. Additionally, the former's bag goes from being present to vanishing. (00:06:18)
Continuity mistake: When Max says, "But I haven't even seen one Pokémon yet!" there is dirt, but in the next shot, it disappears. (00:00:21)
Continuity mistake: In the English dub, when Ash and Pikachu smile after Squirtle jumps into the former's arms, the mountains in the background shrink in size from the last shot. (00:00:51)
There's No Place Like Hoenn - S6-E3
Continuity mistake: When Ash says, "Oh, sure," the top left part of the wall behind him goes from being red slats to being a cream wall. Also, the right part of the wall goes from having no slats after Ash's bag to having some. Additionally, Ash's marks go from being absent to being present. (00:06:08)
To the End of the Full Battle! Each One's Way!! - S5-E63
Continuity mistake: When Charizard stands up after the final attack of his battle, orange stripes appear inside his wings. This also happens when he faints. (00:06:26)
The Legend of Silver Wings! Battle at Silver Rock Island!! - S5-E10
Continuity mistake: When Team Rocket looks at Noctowl as it approaches their balloon, Meowth's cream forepaws turn orange. (00:15:13)
The Kyukon in the Fog! - S5-E23
Continuity mistake: When Ash walks into the fog, the black collar on his shirt turns white. (00:00:15)
Goodbye Chicorita!? The Electric Labyrinth! - S4-E42
Continuity mistake: When Jigglypuff is about to sing to Ash and his friends, the head of security's badge disappears. (00:20:03)
Goodbye Chicorita!? The Electric Labyrinth! - S4-E42
Continuity mistake: When the camera pans across Ash and his after Jigglypuff realizes that they fell asleep, the cut in Bayleef's leaf switches from the left of the leaf to the right. (00:20:21)
Freezer vs Purin! In the Middle of a Snowstorm!! - S4-E32
Continuity mistake: In several shots throughout the episode, Todd's bag disappears.
Goodbye Chicorita!? The Electric Labyrinth! - S4-E42
Continuity mistake: In several shots throughout the episode, Misty's bag disappears.
Goodbye Chicorita!? The Electric Labyrinth! - S4-E42
Continuity mistake: At the end of the episode, Misty's bag is on her right shoulder, but when Brock runs over to the head of security, it is on her left. (00:19:41)
Dig Here Urimoo! Search for the Hot Spring!! - S4-E31
Continuity mistake: When Peggy introduces her father, Todd has his camera case, but after her father explains what his job involves, it is replaced by his bag. (00:03:19)
Freezer vs Purin! In the Middle of a Snowstorm!! - S4-E32
Continuity mistake: When Todd asks if Nurse Joy has seen Articuno, his gloves disappear. (00:05:41)
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.