Revealing mistake: After Meowth tells his plan to Team Rocket, part of the rope Jessie is holding is missing. (00:01:46)
Continuity mistake: When Ash says that there has to be another way to cross the river, the white stripe on his bag disappears. (00:02:46)
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 Lickitung uses Supersonic, Misty's bag disappears. (00:09:27)
Continuity mistake: When Ash and his friends watch the Ledyba fly away, Misty's bag is on her right shoulder, but in the next shot, it is on her left. (00:10:15)
Continuity mistake: When Team Rocket starts flying with the Ledyba, the tips on Meowth's feet disappear. (00:14:24)
Continuity mistake: When Lickitung and Victreebel approach Ash and his friends, Misty's suspenders disappear. In the same shot, her bag switches from her right shoulder to her left. (00:17:47)
Factual error: During the second battle with Team Rocket, Victreebel uses Tackle on Ash and his friends. However, it cannot legally learn it in the Pokémon games. (00:18:18)
Suggested correction: Differences between anime and games are not mistakes.
Continuity mistake: When the Ledyba swing Arbok into Lickitung and Victreebel, the inside of the rings on Lickitung's knees changes from pink to yellow. (00:18:36)
Happinas's Happy Nurse! - S3-E13
Continuity mistake: When a front door opens when Ash is next to it, the handle on the door to the right of it is pink, but in the next shot, it is white. Also, Ash's bag is medium-green in colour, but in the next shot, it is dark-green. (00:01:51)
Happinas's Happy Nurse! - S3-E13
Continuity mistake: When Ash is lying on the ground at the front of the Pokémon Center, the right door's handle is white, but when Brock is interested in Blissey when he is next to her, the handle is grey. (00:02:23)
Happinas's Happy Nurse! - S3-E13
Character mistake: When Jessie asks if she can go to Pokémon Nurse School to become a nurse, the flyer she holds misspells Pokémon Nurse School as "Pokemon Nurse School." (00:07:53)
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)
Kikyo Gym! Sky Battle!! - S3-E15
Other mistake: After Falkner tells Pidgeot to spin and dodge during his match with Team Rocket, Pidgeot is dodging, but does not spin. (00:05:14)
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)
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.
Continuity mistake: When Ash uses his Pokédex to find facts on Sentret, his right index finger and the one below it are together all of the way, but in the next shot, they are apart towards their ends. (00:05:38)
Lizardon Valley! Until We Meet Again!! - S3-E18
Character mistake: When displaying the title card in the English dub, it says "Charizard's Burning Ambitions," but the voiceover incorrectly says it as "Charizard's Burning Ambition." (00:02:21)
Lizardon Valley! Until We Meet Again!! - S3-E18
Continuity mistake: When Liza says, "Your Charizard could use some training!" Pikachu's ears are raised, but in the next shot, they are lowered. (00:09:57)
Big Panic! Kimawari Contest!! - S3-E19
Continuity mistake: When Ash says, "Water!" the puddle near the one under the leaking pipeline is more to the left of it, but in the next shot, it is more to the right of it. (00:01:40)