Showdown in Pewter City - S1-E5
Continuity mistake: When Flint tells Ash to come with him, Ash's gloves disappear. (00:08:15)
The Path to the Pokemon League - S1-E8
Continuity mistake: When Team Rocket is sneaking around the Gym while inside a ball, Meowth's cream forepaws turn orange. (00:12:44)
Continuity mistake: When the power goes out in the Pokémon Centre, Nurse Joy's pink dress turns white, while her white apron turns pink. (00:14:21)
Showdown in Pewter City - S1-E5
Continuity mistake: When Team Rocket is wondering where the trap is, Jessie's right glove changes from black to skin-colour. (00:01:46)
Revealing mistake: When Team Rocket first appears in the Pokémon Center, they are slightly transparent, and the background can be seen through them. (00:13:00)
Battle Aboard the St. Anne - S1-E15
Continuity mistake: In the first shot of the episode, the warehouses at Vermilion Harbor have their entrances facing perpendicular to the bridge leading to them, but as the camera pans closer to Vermilion Harbor as Ash and friends approach it, the entrances face parallel to the bridge. (00:01:28)
Mystery at the Lighthouse - S1-E13
Continuity mistake: When Ash is looking around for Krabby's Poké Ball after it goes from his right hand, the background is a beach at sunset, but in the next shot, it is a forest at sunset. (00:05:06)
Pokemon, I Choose You! - S1-E1
Continuity mistake: When Professor Oak says that tomorrow is an important day for new Trainers, the borders on the board with pictures of the starter Pokémon are blue, but in the next shot, they are brown. (00:02:54)
Pokemon, I Choose You! - S1-E1
Continuity mistake: When Ash is first in bed, the left row of books contains four books with the right containing five, but when the alarm clock falls off its holder, the left has five with the right having four. Also, the white books in the right row changed colour to blue. (00:03:31)
Continuity mistake: When Ash realises that something happened with Pikachu, his bag is below the second-highest plank on the bench, but in the next shot, it is aligned with it. (00:01:27)
Continuity mistake: When Ash requests a baker, the basket further away from the screen has its left strap facing diagonally up, but in the next shot, it is facing vertically. (00:03:45)
Continuity mistake: When Ash reaches the Pokémon Fan Club building, there are cream bricks outside the doors, but in the next shot, they disappear. Also, the right doorknob is aligned with the top of the panels, but in the next shot, they are not. Additionally, the bottom right pane of the right door is aligned with the top of the second part of the right column, and it is more to the bottom of the bottom panes, but in the next shot, they are not. (00:08:47)
Electric Shock Showdown - S1-E14
Revealing mistake: When Nurse Joy says, "A while ago, I came across something like this," a line on her dress shows through her clipboard despite covering it. Also, her left sleeve goes from being absent to being visible. Additionally, her right thumb is not covered by her case, but in the next shot, it is. Furthermore, her left arm is angled up, but in the next shot, it is angled down. (00:11:08)
Mystery at the Lighthouse - S1-E13
Continuity mistake: When the Poké Ball Ash uses for Krabby indicates success, it is at a 22° angle, and there are pieces of wood on the ground, but when Ash goes over to retrieve it, it is at a 45° angle, and the pieces of wood previously on the ground have disappeared. (00:04:49)
Continuity mistake: When there is a front view of Ash carrying Pikachu to the Pokémon Center, his left strap is green, but in the next shot, it is blue. (00:02:17)
The Path to the Pokemon League - S1-E8
Continuity mistake: When A.J. removes his bag, the straps on Ash's are green, but when Butterfree picks up A.J.'s, the straps on Ash's have changed to black. (00:03:27)
Continuity mistake: When Ash says, "We gotta make sure we don't get separated," Misty's right arm is violet, but in the next shot, it is skin-colour. (00:01:32)
Continuity mistake: When Brock says if there are Ghost-type Pokémon, then they can show themselves to them, he, Ash, and Misty are between a doorway, but in the next shot, they are not. (00:08:33)
Haunter Versus Kadabra - S1-E24
Continuity mistake: When Ash says that there is nothing to worry about, there is a blue building to the left of Ash's left shoulder, but in the next shot, the building is yellow. (00:04:00)
Battle Aboard the St. Anne - S1-E15
Continuity mistake: When the gentleman asks, "So, you're having a good time?" a plate next to a plate with cake goes from being present to being absent. (00:10:33)
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.