Continuity mistake: In one shot during Randall's flashback, the stripes on his shoes disappear. (00:09:22)
Continuity mistake: When Ash and Randall are about to attempt to break the pod Pikachu is in, Randall does not have his hat, but in the next shot, it appears. (00:17:27)
Continuity mistake: Before Ash, his friends, and the kindergartners throw their balls into the air, one of Ash's gloves disappears. (00:11:33)
Audio problem: After James says that Team Rocket should capture Sylveon, the sound of Wobbuffet's Poké Ball opening can be heard, despite him already being out. (00:06:27)
Giving Chase at the Rhyhorn Race! - S17-E7
Continuity mistake: When Ash and his friends look at the Rhyhorn, Ash's gloves turn completely black. This also happens when he puts on his uniform. (00:07:09 - 00:09:46)
Giving Chase at the Rhyhorn Race! - S17-E7
Continuity mistake: When Serena says that she wanted to meet Ash, the stripe on Ash's sleeve disappears. (00:05:16)
Flower Power - S3-E6
Audio problem: Towards the end of the episode, when Ash and his friends are cheering for Bailey, Misty's mouth moves, but no sound can be heard. (00:20:13)
Flower Power - S3-E6
Factual error: During the second battle with Team Rocket, Arbok and Victreebel use Tackle, a move they cannot legally learn in the games. (00:18:15)
Suggested correction: Differences between anime and games are not mistakes.
Flower Power - S3-E6
Other mistake: During the second battle with Team Rocket, James tells Victreebel to use Take Down, but it actually uses Swords Dance. This error is corrected in the Polish dub. (00:18:08)
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)
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)
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)
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)
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)
In the Knicker of Time! - S6-E5
Continuity mistake: When Nicholai notices that May and Max are wearing shorts, Max's brown shorts turn blue like Nicholai's. (00:04:13)
Wataru and the Red Gyarados! - S5-E26
Continuity mistake: When Ash and his friends are scared by the Red Gyarados, Misty's bag disappears. (00:01:11)
Fierce Battle in the Monster Ball Factory! Pikachu VS Nyarth!! - S18-E34
Revealing mistake: After Pikachu points to Ash's friends, Ash's left hand passes through him. (00:17:39)
Fierce Battle in the Monster Ball Factory! Pikachu VS Nyarth!! - S18-E34
Revealing mistake: When Ash and his friends put all their Poké Balls in the case, Bonnie's hands are briefly drawn like Clemont's. (00:03:04)