Continuity mistake: When Team Rocket blasts off, Arbok's pattern changes from red with yellow centres to yellow with red centres. (00:19:03)
The Mandarin Island Miss-match - S2-E18
Continuity mistake: When Ash wins the match in the beginning, Tracey's orange bag turns green like Ash's. (00:01:12)
The Mandarin Island Miss-match - S2-E18
Revealing mistake: When Prima walks over to Ash and his friends, she is briefly layered between the table and Tracey. (00:03:06)
The Mandarin Island Miss-match - S2-E18
Character mistake: Prima tells Jynx to use Ice Beam, but she very obviously uses Ice Punch. [This is actually a result of mistranslation. In the Japanese version she orders Jynx to use Ice Punch.]. (00:18:50)
Continuity mistake: When Tracey says, "There'll be guards everywhere now," Misty is behind Ash, but in the next shot, she is not. (00:10:31)
The Pokémon Water War - S2-E25
Continuity mistake: When Ash says, "I know you're pretty tired Lapras; you deserve a rest," Tracey is not holding a map in front of him, but in the next shot, he is. (00:00:38)
The Pokémon Water War - S2-E25
Continuity mistake: When people are first running, Tracey has his head turned, but in the next shot, it is not. (00:01:07)
The Pokémon Water War - S2-E25
Plot hole: When Officer Jenny says why Captain Aidan needs to get Team Wartortle to the location of the final fire, she says that Team Blastoise's path is blocked by a lorry, and Team Squirtle is not powerful enough for the fire. This does not make sense for the former as Team Blastoise later pushes the same lorry aside. (00:13:41)
Plot hole: When Team Rocket decides that they're going to capture Dragonite after it's been worn out, they appear in the blimp above the battlefield no less than ten seconds after they were shown in the stands. There is just way too little time for them to have possibly gotten up there that fast, even allowing for anime physics. (00:14:30)
Plot hole: Officer Jenny asks Ash what he knows about the "trio" when he tells her that the pirates are likely Team Rocket, but he hadn't said anything about there being three of them before that. And Jenny obviously didn't know anything about Team Rocket, either. (00:05:30)
Continuity mistake: When Brock is next to Ash at a cabinet, the right support of the table goes from being a darker brown than the top of it with it being not past the oven to being the same brown with it past it. Also, the number of rows of tiles before the window goes from four to five. (00:02:39)
Continuity mistake: When Ash and Misty wonder what happened with Brock's internship with Professor Ivy, the rectangle with the button on Misty's shorts goes from blue to yellow. Also, there is moulding in the living room, but in the next shot, it disappears. (00:03:45)
Continuity mistake: When Professor Oak introduces the Johto Pokédex to Ash, its black antenna turns red. (00:14:42)
Don't Touch That 'dile - S3-E1
Revealing mistake: As Brock starts heading to New Bark Town, he passes through Pikachu. (00:06:10)
Don't Touch That 'dile - S3-E1
Revealing mistake: When Officer Jenny is describing the situation that occurred at Professor Elm's laboratory, the balloon held at the centre of the arch is translucent with the laboratory being able to be seen through it. (00:08:36)
Don't Touch That 'dile - S3-E1
Continuity mistake: When Professor Elm says, "So I suppose you know Professor Samuel Oak,"Misty's and Brock's mouths are open, but in the next shot, they are closed. (00:09:43)
Don't Touch That 'dile - S3-E1
Revealing mistake: When Officer Jenny takes Totodile from Ash's hands, her right hand clips through it and Ash's left hand. (00:17:50)
Don't Touch That 'dile - S3-E1
Continuity mistake: When Ash and friends are with Nurse Joy when she is holding Totodile, Ash has gloves on his hands, but when Ash's image appears on a yellow screen, the hand portions of his gloves disappear, making it appear as if he was wearing wristbands. (00:19:22)
Don't Touch That 'dile - S3-E1
Continuity mistake: When Ash's image is on a yellow screen, Ash has wristbands on his hands, but when Ash takes his Pokédex after Nurse Joy registers him for the Johto Pokémon League, hand portions appear on his wristbands, thus making him have gloves. (00:19:36)
The Double Trouble Header - S3-E2
Continuity mistake: When Pikachu notices Casey and Chikorita, the part of Ash's jacket to the right of his right strap excluding the sleeve goes from blue to white and then back to blue. (00:01:26)
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.