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)
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)
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)
Tentacool and Tentacruel - S1-E19
Revealing mistake: When Brock says that Tentacruel is using Meowth as a puppet, his neck is not fully coloured in. In addition, while Tentacruel was holding Meowth, it was actually a Tentacool that was controlling him. (00:13:39)
Electric Shock Showdown - S1-E14
Revealing mistake: When Lt. Surge sends out his Raichu for the first time, the screen freezes for a few seconds. (00:06:29)
Revealing mistake: When Ash and Ritchie fly out of the van, they are layered behind it. (00:19:03)
Revealing mistake: When Ash and Ritchie put their Poké Balls in the bag, Ritchie's right hand passes through it. (00:07:27)
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)
The Breeding Center Secret - S1-E55
Revealing mistake: When Butch takes Todd's camera, it is layered behind Todd's hands. (00:15:05)
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)
Island of the Giant Pokemon - S1-E17
Revealing mistake: When Team Rocket is about to use the brakes in the cart, Jessie disappears from the cart, but her outline is still there. In the same shot, James overlaps her. Additionally, the cart is moving forward, but after Team Rocket breaks the brakes, it is moving backward. (00:16:09)
Island of the Giant Pokemon - S1-E17
Revealing mistake: When Jessie first saw pulling the cable, the phone is not fully coloured in, and the background can be seen through it. (00:13:08)
The Path to the Pokemon League - S1-E8
Revealing mistake: When Ash and his friends turn to A.J., Ash's left hand passes through Brock. (00:03:00)
Revealing mistake: When Team Rocket first appears in the Pokémon Center, they are slightly transparent, and the background can be seen through them. (00:13:00)
Battle Aboard the St. Anne - S1-E15
Revealing mistake: When Giovanni says, "I'm disgusted watching you fail me, when you and I expect total perfection," his left hand clips through Persian with his left thumb clipping twice. (00:04:53)
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)
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)
Mystery at the Lighthouse - S1-E13
Revealing mistake: When Professor Oak puts tofu in a bowl, the tofu is briefly shown behind it instead of in it with the ladle it is on having a line from the bowl showing through it. Also, when he gets it out, the tofu is not fully coloured in. (00:09:02)
Electric Shock Showdown - S1-E14
Revealing mistake: When Nurse Joy says, "A while ago, I came across something like this," a line on her dress shows through her clipboard despite covering it. Also, her left sleeve goes from being absent to being visible. Additionally, her right thumb is not covered by her case, but in the next shot, it is. Furthermore, her left arm is angled up, but in the next shot, it is angled down. (00:11:08)
Answer: Yes it ran away because Layla hurt its feelings.