Revealing mistake: When Ash brings his first piece of meat into his mouth, another one disappears into thin air. (00:09:09)
Revealing mistake: When Ash and Ritchie put their Poké Balls in the bag, Ritchie's right hand passes through it. (00:07:27)
Revealing mistake: When Ash and Ritchie fly out of the van, they are layered behind it. (00:19:03)
Revealing mistake: When Ash tells Lapras to go back to the ocean, his left arm is transparent. (00:14:18)
Revealing mistake: When Ash's friends run over to him, as he dives into the pool, Pikachu can be running in midair. (00:14:27)
Revealing mistake: The pedal James presses when he slows down the lorry is the same one he used when speeding it up. This is due to the shot of him slowing the lorry down being a recycled shot of him speeding it up. (00:18:35)
Revealing mistake: As Ash, Misty, and Tracey are making their way through the crowd, Tracey clips through one of the people in it. (00:05:33)
The Mandarin Island Miss-match - S2-E18
Revealing mistake: When Prima walks over to Ash and his friends, she is briefly layered between the table and Tracey. (00:03:06)
Don't Touch That 'dile - S3-E1
Revealing mistake: As Brock starts heading to New Bark Town, he passes through Pikachu. (00:06:10)
Don't Touch That 'dile - S3-E1
Revealing mistake: When Officer Jenny is describing the situation that occurred at Professor Elm's laboratory, the balloon held at the centre of the arch is translucent with the laboratory being able to be seen through it. (00:08:36)
Don't Touch That 'dile - S3-E1
Revealing mistake: When Officer Jenny takes Totodile from Ash's hands, her right hand clips through it and Ash's left hand. (00:17:50)
Revealing mistake: After Ash says that it is his and his friends' duty to show that it is wrong to use Pokémon for wrongful deeds, part of Pikachu is missing. (00:07:34)
Revealing mistake: When James throws the bottle caps at Ash and his friends, he is with the bowl he stole, despite it not being present before or after this shot. This is due to the fact that this shot is recycled from when he threw them earlier in the episode. (00:16:37)
Revealing mistake: After Meowth tells his plan to Team Rocket, part of the rope Jessie is holding is missing. (00:01:46)
Revealing mistake: When Ash turns to Pikachu after first being exhausted, his right hand clips through himself. (00:04:08)
Aim to Be a Metamon Master! Imite - S4-E17
Revealing mistake: At the beginning of Team Rocket's motto and shortly after, James appears to be floating in midair. (00:06:49 - 00:07:30)
Aim to Be a Metamon Master! Imite - S4-E17
Revealing mistake: When Pikachu joins the fight against Team Rocket, he passes through Mini-Dit. (00:15:51)
Goodbye Chicorita!? The Electric Labyrinth! - S4-E42
Revealing mistake: After Team Rocket enters the lift, Ash runs in place for a few frames in the transition to the next shot. (00:16:42)
Set Out to the Sea! Line of Chonchie!! - S5-E3
Revealing mistake: When a Chinchou hops up some stairs, it clips through the last step. (00:00:47)
Okutank and Teppouo! Whirlpool Cup Preliminaries!! - S5-E6
Revealing mistake: When Ash gets his Pokédex, it and his right hand appear from thin air. (00:05:56)
Answer: Yes it ran away because Layla hurt its feelings.