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)
Natio's Big Prediction! - S5-E25
Revealing mistake: When Ash takes his Pokédex out, his right hand clips through his right trouser pocket. (00:03:26)
Answer: Yes it ran away because Layla hurt its feelings.