Continuity mistake: When Ash says, "Misty'll take good care of your Marill, you'll see," Wilhomena is holding her parasol with on hand, but in the next shot, she is holding it with two. (00:09:16)
Suggested correction: I rewatched the shots, and Wilhomena is holding her parasol with both hands in both of them.
Kikyo Gym! Sky Battle!! - S3-E15
Continuity mistake: When Pikachu agrees after Ash says, "Someday, I'll go back and see my old friend," his mouth is open, but in the next shot, it is closed. Also, Brock is to the left of Ash, but in the next shot, he is not. (00:06:32)
The Ninja Poke-Showdown - S1-E32
Continuity mistake: When Misty asks, "Brock, what kind of crazy place is this?" her bag is under and next to her, but in the next shot, it's not under her and is 0.33 metres away from her. (00:03:24)
Dai Pinch! Madatsubomi no tô - S3-E14
Continuity mistake: When Zacky is excited to meet Ash, Lizzie's mouth is open, but in the next shot, it is closed. (00:02:50)
Continuity mistake: When Ash and friends turn to look at Growlithe's mansion, Brock's left bag goes from brown to red. (00:02:31)
Continuity mistake: When Arielle lands on the bridge, she is on two planks, but in the next shot, she is on one. (00:03:49)
Continuity mistake: When Ash, Misty, and Brock turn to Woodruff after he says for Ash to wait, Ash's right glove goes from covering his thumb to not covering it. (00:02:23)
Continuity mistake: When Officer Jenny is first describing the situation, her strap is not over her right shirt pocket, but in the next scene, it is. (00:05:52)
Continuity mistake: When a servant says, "All the usual places," the blue-haired servant has his mouth open, but in the next scene, it is closed. (00:01:46)
Charmander: The Stray Pokemon - S1-E11
Revealing mistake: When Brock passes Misty when he leaves the table she is at, he clips through her and the stool she is sitting on, and after he does, part of the former is missing. (00:07:08)
Continuity mistake: When a man says, "Hey, that looks like amberite," the case with amberite is open all of the way, but in the next shot, it is partially open. (00:07:38)
Continuity mistake: When Ash says, "Isn't it cute?" the strip on his left shoe to the left of the shoelaces there is white, but in the next shot, it is black. (00:04:12)
Battle Aboard the St. Anne - S1-E15
Continuity mistake: When James asks, "Are you addressing me?" the people behind him change. (00:08:52)
Continuity mistake: When Officer Jenny says, "It's here for the raising and protection of Pokémon," the map near her changes designs. (00:02:07)
The Path to the Pokemon League - S1-E8
Continuity mistake: When Ash is surprised by what he sees in A.J.'s Gym, the marks on his cheeks go from being present to being absent and then back to present. (00:08:17)
Here Comes the Squirtle Squad - S1-E12
Continuity mistake: When Officer Jenny says, "It's a real shame," Ash goes from having no part of Brock's left sleeve to the right part of Ash's right sleeve to having part of it. Also, he goes being in front of and to the side of Misty to being only to the side of her. (00:05:20)
Continuity mistake: When Officer Jenny says, "This is the cutest one on the force," the strap of her bag is underneath and to the right side of her right shirt pocket, but in the next shot, it is over and to the center of it. (00:05:32)
Continuity mistake: When Ash is excited to see Ritchie when they are in the crowd next to the van, the people around Ash change. (00:06:41)
Continuity mistake: When the elevator doors open to the first floor, the part of the elevator indicating where it is has its background grey, but in the next shot, it is black. (00:05:31)
Continuity mistake: When Ash brings Pikachu to allow Ritchie to power the elevator, his right jacket strip goes from being absent to being present. (00:05:02)