Try to Study! Pokémon Trainer's School! - S6-E15
Revealing mistake: When Ash says, "No problem!" in response to Roxanne asking if it is all right to postpone his match at the Rustboro Gym, Pikachu's mouth duplicates. Also, Ash and Roxanne go from being 90 centimetres from each other to being 30 centimetres away. Additionally, the former's bag goes from being present to vanishing. (00:06:18)
Try to Study! Pokémon Trainer's School! - S6-E15
Continuity mistake: When Roxanne says that everyone at the Training Academy can receive lectures from Professor Oak and her, Ash has his bag on and is 90 centimetres away from Roxanne, but in the next shot, he is 30 centimetres away and does not have his bag. Also, Pikachu's left forepaw is behind Ash's left shoulder, but in the next shot, it is in front of it. (00:05:53)
The Path to the Pokemon League - S1-E8
Continuity mistake: When A.J. removes his bag, the straps on Ash's are green, but when Butterfree picks up A.J.'s, the straps on Ash's have changed to black. (00:03:27)
Continuity mistake: When there is a front view of Ash carrying Pikachu to the Pokémon Center, his left strap is green, but in the next shot, it is blue. (00:02:17)
Mystery at the Lighthouse - S1-E13
Continuity mistake: When the Poké Ball Ash uses for Krabby indicates success, it is at a 22° angle, and there are pieces of wood on the ground, but when Ash goes over to retrieve it, it is at a 45° angle, and the pieces of wood previously on the ground have disappeared. (00:04:49)
The Case of the K-9 Caper - S1-E52
Continuity mistake: When Officer Jenny is first with a tray with cups, the last character on the paper on the wall in front of the back wall to the left disappears between shots. (00:04:12)
The Case of the K-9 Caper - S1-E52
Continuity mistake: When zooming out on Officer Jenny when she is in the police station, there is no spatula on the wall, but in the next shot, a spatula appears. Also, the last character on the paper to the left changes. (00:04:15)
Pokemon, I Choose You! - S1-E1
Other mistake: When Ash gets Pikachu's Poké Ball from Professor Oak, the latter's hand right hand is drawn backwards. (00:06:52)
Pokemon, I Choose You! - S1-E1
Continuity mistake: When Gengar dodges, there is a Poké Ball pattern on the field, but in the next shot, it disappears. (00:01:57)
Other mistake: In the English dub, when Bayleef jumps up in the opening, her left pupil is mistakenly coloured white instead of black. (00:00:47)
Other mistake: In the English dub, when Bayleef jumps up in the outro, her left pupil is mistakenly coloured white instead of black. (00:21:00)
Pokemon, I Choose You! - S1-E1
Continuity mistake: When Ash leaves on the bicycle, his zipper line is black, but when he says,"I'll give it back someday!" the zipper line has changed to green. (00:17:05)
Continuity mistake: When Mays, "There might be more to Pokémon than I thought," she is there, but in the next shot, she disappears. (00:11:48)
Other mistake: When Nurse Joy says, "Transporting Poké Balls," the screen changes between shots. Also, the land and water have their colours reversed with the cities appearing on water instead of land. (00:14:45)
Continuity mistake: When Ash, Misty, and Brock are talking while they follow Pikachu, the button on Misty's shorts goes from blue to yellow constantly. (00:02:29)
Mystery at the Lighthouse - S1-E13
Other mistake: When the front of the Kabuto costume falls off, the part of Bill's body above his arms is missing. (00:12:34)
Continuity mistake: When first showing a clock, the edge of the roof is medium-brown, but in the next shot, it is dark-brown. (00:06:42)
Charmander: The Stray Pokemon - S1-E11
Continuity mistake: After Ash says, "According to my calculations, it does," the map he is holding changes design between shots. (00:02:10)
The Case of the K-9 Caper - S1-E52
Continuity mistake: When Ash retracts his hands after placing his chopsticks on his bowl, they are not pointing to a bowl, but in the next shot, they do. (00:04:51)
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)
Answer: Yes it ran away because Layla hurt its feelings.