Continuity mistake: When Misty says, "I wouldn't be surprised if the next gym leaders are tougher than the last ones," the right strap of Tracey's rucksack is on his collar, but in the next shot, it is not. Also, the marks on Ash's cheek go from looking like zs to looking like two pairs of lines. Additionally, his mouth is open, but in the next shot, it is closed. (00:01:42)
Continuity mistake: When Professor Oak asks, "Are you there already?" there are lights and moulding on the screen, but in the next shot, there are not. (00:06:31)
Continuity mistake: When first showing the entrance to the satellite dish, three blocks are above the doors, but in the next shot, there are two. Also, there is a sign that says, "Keep Out," but in the next shot, there is no text on it. Additionally, there is a sign with "WARNING" with a skeleton angled to the top right coner of it with its arms and legs straight, but in the next shot, it has "WARNING!" with its skeleton pointing to the top left corner with its limbs bent. (00:06:42)
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)
Continuity mistake: When Professor Oak introduces the Johto Pokédex to Ash, its black antenna turns red. (00:14:42)
Continuity mistake: When Tracey recalls Scyther, the ring around the button on the Poké Ball disappears. (00:20:36)
Continuity mistake: When Lickitung runs into Victreebel, its pink eyebrows turn yellow. (00:17:15)
Continuity mistake: When Ash throws a Poké Ball to catch Scyther, his bag disappears. (00:04:40)
Continuity mistake: When Tracey asks if Misty is coming with him and Ash, part of Misty's arms changes from skin-colour to yellow. (00:01:49)
Continuity mistake: When Team Rocket blasts off, Arbok's pattern changes from red with yellow centres to yellow with red centres. (00:19:03)
Continuity mistake: When Ash calls out to Pikachu after he disappears, his bag disappears. (00:03:49)
Continuity mistake: Right before Tracey says that Ash is heading towards a cliff, Pikachu's tail turns completely yellow. (00:19:13)
Continuity mistake: When Team Rocket is eavesdropping on Ash and his friends, Meowth does not have a lei, but in the next shot, one appears. (00:09:06)
Continuity mistake: When Ash tells Tracey to watch out, the strap on Misty's bag disappears. (00:06:30)
Continuity mistake: When Misty tells Ash that they should take a break, her bag disappears. This also happens when she says that they may be on a deserted island. (00:02:28)
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)
Continuity mistake: When Misty steps on Tracey, Tracey's blue shoes turn black. (00:02:13)
Continuity mistake: When Tracey wonders why everyone is outside the museum, the black straps on his bag turn orange, like the rest of the bag. (00:05:29)
Continuity mistake: In several shots throughout the episode, the black straps on Tracey's bag turn orange.
Continuity mistake: When Meowth says that he will use The Crystal Onix to make a charm, his white claws turn cream, like his body. (00:16:51)
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.