Battle! Hassam vs Heracross!! - S3-E24
Continuity mistake: When Ash turns to Scizor after Brock says, "Look!" Brock goes from being absent to being present. (00:02:55)
Merriep and the Pasture Girl - S3-E23
Continuity mistake: When Ash turns his head after Mary tells the Mareep to stop interacting with Pikachu, the back of his hat goes from red to white and then back to red. (00:03:37)
Chicorita's Jealousy!? - S3-E20
Continuity mistake: At the beginning of the episode, Chikorita is inside a pipe, but in the next shot, the pipe vanishes. (00:01:16)
Suggested correction: I watched the shot and Chikorita is not in the pipe to begin with.
A Chain of Whirlpool Islands! A Renewed Challenge!! - S5-E1
Continuity mistake: When Marius says, "Why don't we give these kids a chance to rest up a bit after the experience they've just had?" his left arm is bent to the right, but in the next shot, it is bent upward. (00:07:52)
Continuity mistake: When Ash allows Misty to have a break, there is no tree in front of the tree behind Ash that is closest to him, but in the next shot, there is. Also, Ash's head is turned, but in the next shot, it is not. (00:02:35)
Pokemon, I Choose You! - S1-E1
Continuity mistake: When Ash and Misty turn to look at the flock, Misty is pointing her right index finger away behind her, but in the next shot, she points it in front of her. (00:16:41)
Pokemon, I Choose You! - S1-E1
Continuity mistake: When Misty turns to look at her bicycle, the left pedal on it is higher than the right one, but in the next shot, it is lower than it. (00:16:43)
Fushigidane and Fushigidane! Regaining the Monster Balls!! - S7-E34
Continuity mistake: When Ash and friends first have a conversation with Professor Oak, Ash is not there, but in the next shot, he is. (00:05:08)
Showdown in Pewter City - S1-E5
Continuity mistake: When Ash says, "That's a great idea!" Flint's right arm is turned towards his right side, but in the next shot, it is turned forward. (00:10:12)
Kogane Gym! Speed & Power!? - S4-E1
Continuity mistake: When Misty says, "Wait for us!" the sign on the front of the burger restaurant is 30 centimetres away from the trim on it, but in the next shot, it is fifteen centimetres away. (00:02:05)
Continuity mistake: When Pikachu agrees after Professor Oak says, "That's the spirit!" he is on one tile, but in the next shot, he is on two. (00:11:08)
Dance, Waninoko! The Steps of Love!! - S3-E37
Continuity mistake: When Misty says, "Don't forget to always swim with a buddy!" there are no rocks close to the grass, but in the next shot, there are two. (00:01:36)
Whose Is the Waninoko!? Satoshi vs Kasumi! - S3-E35
Audio problem: When Pikachu says, "Pika?" as he is surprised about Ash's win in his match with Chikorita and Staryu, his mouth does not pronounce the "P" in "Pika." (00:13:17)
Continuity mistake: When Brock says, "It's a cave where a lot of Onix are supposed to live," he is present, but in the next shot, he is not. (00:01:32)
Continuity mistake: When tea is being poured, there is a forest, but in the next shot, it is the Pokémon Day Care. Also, Pikachu is not present, but in the next shot, he is. (00:05:28)
Burn, Zenigame Squad! Like a Fire!! - S3-E31
Continuity mistake: When Misty says, "Your Pokémon are finally finished with their physical exams!" Brock is not behind her, but in the next shot, he is. (00:02:21)
The Water Flowers of Cerulean City - S1-E7
Continuity mistake: When Brock asks, "Shouldn't you head for Cerulean City Gym?" a street lamp goes from being present to being absent. (00:06:14)
Continuity mistake: When Ash takes out his Pokédex to find facts on Quagsire, it and his right hand clip through him. Also, his right sleeve goes from being all white to white and blue and his right jacket strip goes from being present to being absent. (00:02:09)
Continuity mistake: When Ash uses his Pokédex to find facts on Chikorita, his right thumb is not covered and his right pinkie finger is not bent, but in the next shot, his thumb is covered and his pinkie finger is bent. (00:02:54)
Continuity mistake: When Ash uses his Pokédex to find facts on Hoothoot, his left index finger is not past the right side of the Pokédex, but in the next shot, it is. (00:03:36)