Abra and the Psychic Showdown - S1-E22
Continuity mistake: When Ash notices the Saffron City Gym, the buildings in the background change. (00:06:38)
Other mistake: When Ash, Misty, and Brock are worried about the cyclone approaching, the edges of Meowth's ears are mistakenly colored tan instead of black. (00:20:08)
Island of the Giant Pokemon - S1-E17
Other mistake: In the recap, when Ash, Misty, and Brock are worried about the cyclone approaching, the edges of Meowth's ears are mistakenly colored tan instead of black. (00:01:16)
Hanecco's Jealousy! Battle in Big Prairie!! - S3-E21
Continuity mistake: When Ash says, "There's a couple of Gloom over there!" Pikachu's mouth is open, but in the next shot, it is closed. Also, Misty is not smiling, but in the next shot, she is. (00:01:29)
Character mistake: When first showing the tournament from the front, a sign misspells Pokémon Number One as "Pokemon Number One." (00:07:46)
Pokemon, I Choose You! - S1-E1
Continuity mistake: When Gary is first talking to his crowd, there is a woman with blue-green hair, a pink dress, and a yellow apron to the left, but in the next shot, she is replaced by a boy in a green shirt with brown hair and without an apron. (00:05:11)
Fushigidane and Fushigidane! Regaining the Monster Balls!! - S7-E34
Other mistake: The English title card misspells Poké Balls as "Pokéballs." (00:02:41)
The Fourth Round Rumble - S1-E77
Character mistake: When a poster for the Pokémon League is seen, it misspells it as "Pokemon League." (00:20:22)
Mystery at the Lighthouse - S1-E13
Other mistake: When Brock turns his head to the costume, his nose is missing. (00:12:47)
Suggested correction: Agree with the other correction. Dropping details, such as facial features like a nose or mouth, and simplifying character designs is a very common and encouraged drawing/animation technique to imply distance. This isn't something the animators would just overlook. It was a deliberate decision. Ash and Misty similarly look somewhat less detailed than they do in closer shots. At best, this would be a deliberate mistake, but I personally think it falls under the umbrella of "suspension of disbelief" and shouldn't be considered a mistake given it's a stylistic choice to imply distance.
Suggested correction: His nose isn't seen because he is far away from the camera.
Continuity mistake: When Brock says, "Looks like a greenhouse," he is holding the straps of his rucksack, but in the next shot, he is not. (00:04:08)
Tentacool and Tentacruel - S1-E19
Revealing mistake: When Brock says, "Ah! Zubat!" his neck is not fully colored in. (00:15:50)
Who Gets to Keep Togepi? - S1-E48
Character mistake: At the beginning of the episode, the sign on the Pokémon Center misspells Pokémon Center as "Pokemon Center." (00:01:13)
Alola! The Starting Island, the Starter Pokémon!! - S20-E1
Continuity mistake: After Ash tells Delia what he did at the beach, Delia's bracelet disappears. This also happens after the flashback of Ash receiving the Egg. (00:03:00 - 00:03:51)
Flower Power - S3-E6
Continuity mistake: After Bailey tells Ash and his friends to come to her workout tomorrow, Ash's hat turns completely red. (00:14:05)
The School of Hard Knocks - S1-E9
Continuity mistake: After the title card, Ash and Misty have their bags on, but as the shot progresses, they will occasionally disappear. (00:02:03 - 00:02:58)
A New Land! A New Adventure!! - S6-E1
Revealing mistake: In the English dub, during the "Who's That Pokémon?" segment, part of Lanturn's tailfin is cut off. (00:11:39)
The Startling Yamirami! - S6-E29
Continuity mistake: When Ash and his friends eat the sandwiches, May's white skirt turns red like her shirt. (00:01:06)
Fierce Fighting! Jungle Battle at the Battle Palace!! - S9-E19
Continuity mistake: When Team Rocket falls into their trap, Mime Jr.'s left arm changes from pink to blue. (00:11:47)
In the Knicker of Time! - S6-E5
Continuity mistake: After Nicholai introduces himself, the bottom of Max's shirt changes from green to yellow. (00:04:43)
The Startling Yamirami! - S6-E29
Continuity mistake: When Corphish slices a root, one of its pincers turns completely red. This also happens shortly after when it slices the sandwiches. (00:00:36 - 00:00:58)
