Abra and the Psychic Showdown - S1-E22
Revealing mistake: When Sabrina puts her right hand on the floor of a hallway, the lines that indicate the impact of her hand remain after it happens. Also, her aforementioned hand is on the floor, but in the next shot, it is not there. Additionally, the door to the right is blue, but in the next shot, it is brown. The shot after also has the dresser, its items, and the rug in the main room going from present to absent. (00:15:43)
Primeape Goes Bananas - S1-E25
Revealing mistake: When Misty and Brock pick up Ash while Team Rocket is fighting Primeape, Brock's left arm passes through him. (00:11:45)
Pokemon Fashion Flash - S1-E28
Revealing mistake: When Koffing and Ekans trip over their outfits, Koffing's lower body is briefly missing. (00:16:47)
Sparks Fly for Magnemite - S1-E30
Revealing mistake: When Ash and his friends start running away from the Grimer, some of the Grimer are floating in midair. (00:12:45)
The Ninja Poke-Showdown - S1-E32
Revealing mistake: When Pikachu turns his head after a Venonat leaves, his left ear clips through Ash. Also, part of Ash's right leg is missing. (00:03:46)
Revealing mistake: When Ash goes to save the Pikachu in the river, he clips through his and Misty's bags. (00:05:25)
The Battling Eevee Brothers - S1-E38
Revealing mistake: When Rainer says that he used Pokémon Friend to plan the party, Jolteon is misplaced over a woman and Rainer. (00:07:25)
Showdown at Dark City - S1-E40
Revealing mistake: When Ash apologises to the young boys, one of the boys' left arm is disconnected from his body. (00:02:09)
Showdown at Dark City - S1-E40
Revealing mistake: When the Yas Gym underlings send out their Pokémon to attack Ash, the Poké Balls disappear into thin air. (00:09:51)
The March of the Exeggutor Squad - S1-E41
Revealing mistake: When Misty tells Melvin to be careful, her left arm passes through the stage. (00:05:13)
The March of the Exeggutor Squad - S1-E41
Revealing mistake: When Misty tells Ash to stop looking at the Exeggcute, Ash's left hand is layered over the Exeggcute. (00:09:03)
The March of the Exeggutor Squad - S1-E41
Revealing mistake: When Melvin is throwing Poké Balls, they appear out of thin air before he throws them. (00:11:42)
Revealing mistake: When Todd tells Ash to stop spraying him, his bag passes through his body. (00:03:10)
Revealing mistake: When Ash and his friends look at the picture of Aerodactyl in the book, Ash's left arm passes through the book. (00:04:43)
The Breeding Center Secret - S1-E55
Revealing mistake: When Butch takes Todd's camera, it is layered behind Todd's hands. (00:15:05)
The Breeding Center Secret - S1-E55
Revealing mistake: After Misty says Team Rocket broke into the breeding centre to steal Pokémon, Team Rocket's hands remain on the bars when they are disappointed. (00:18:23)
Revealing mistake: As the camera pans up to Meowth in a crane, a building's windows move with the screen. (00:08:01)
Revealing mistake: When Team Rocket runs out of their cabin, Meowth's tail passes through a wall. (00:12:34)
Revealing mistake: When Pikachu meets Puka on the cliff, we are treated to an aerial shot which shows the ocean below. There is sunlight reflecting off the surface, but as the camera moves, the lights pass in front of the two Pikachu on the cliff. (00:07:26)
Revealing mistake: When one of the staff of the Pokémon League goes over to type on the keyboard, she clips through a device in the process. (00:02:40)
Answer: Yes it ran away because Layla hurt its feelings.