Island of the Giant Pokemon - S1-E17
Other mistake: When Ash wakes up on the beach, part of the sides of the hat overlaps the front. (00:01:53)
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)
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)
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)
Mystery at the Lighthouse - S1-E13
Other mistake: When Bill says, "A meaning for all Pokémon, and a meaning all of us humans too," a Sandslash on a screen has an entirely yellow head and has black pupils with white sclerae. Sandslash actually have the lower part of their head coloured cream and have their white pupils with black sclerae. (00:14:01)
The Path to the Pokemon League - S1-E8
Other mistake: When A.J. is grateful when Sandshrew returns, his Butterfree's antennae are missing occasionally. (00:15:24)
Electric Shock Showdown - S1-E14
Other mistake: When Ash mentions that Lt. Surge must be a great Trainer, a Rattata's left eye is missing. (00:02:43)
Other mistake: When the computer in the storage room says, "Downloader activated," the land and water are reversed with the cities appearing on water instead of land. (00:15:02)
Battle Aboard the St. Anne - S1-E15
Other mistake: When showing Raticate and Butterfree on a screen during the first trade, they are coming from the sides that their Poké Balls are not on. (00:11:58)
Answer: Yes it ran away because Layla hurt its feelings.