The Breeding Center Secret - S1-E55
Audio problem: When Butch puts a Charmander on a conveyor belt, Cassidy speaks, but her mouth does not move. (00:03:08)
Flower Power - S3-E6
Audio problem: Towards the end of the episode, when Ash and his friends are cheering for Bailey, Misty's mouth moves, but no sound can be heard. (00:20:13)
Whose Is the Waninoko!? Satoshi vs Kasumi! - S3-E35
Audio problem: When Pikachu says, "Pika?" as he is surprised about Ash's win in his match with Chikorita and Staryu, his mouth does not pronounce the "P" in "Pika." (00:13:17)
Kirinriki! The Village of Esper Pokémon! - S3-E40
Audio problem: When Girafarig speaks, after Cherry tells Ash to relax, its voice plays before its mouth moves. (00:03:21)
Freezer vs Purin! In the Middle of a Snowstorm!! - S4-E32
Audio problem: After Brock says that Ash and Todd cannot climb the mountain without proper clothing, Misty moves her mouth, but no sound can be heard. (00:10:15)
Eifie and Sakura! Enju City Once Again!! - S5-E17
Audio problem: When Brock says that he cannot tell which of the Kimono Sisters is the most beautiful, his mouth does not move. This also happens with Satsuki after Jessie asks the Kimono Sisters if they are looking for dance instructors. (00:03:13 - 00:04:48)
The Startling Yamirami! - S6-E29
Audio problem: When Ash asks what happened with Corphish, his mouth does not move. (00:15:05)
Evolution! That Mystery and Wonder!! - S8-E50
Audio problem: When Officer Jenny is dodging, her and Brock's mouths are not moving when they speak. (00:16:49)
Audio problem: During the battle with Team Rocket, when Ash tells Pikachu to use Thunderbolt for the first time, Pikachu's voice plays before his mouth moves. (00:16:41)
Audio problem: After James says that Team Rocket should capture Sylveon, the sound of Wobbuffet's Poké Ball opening can be heard, despite him already being out. (00:06:27)
Fierce Battle in the Monster Ball Factory! Pikachu VS Nyarth!! - S18-E34
Audio problem: When Clemont tells the factory workers to wait, his mouth does not move. (00:02:47)
Answer: Yes it ran away because Layla hurt its feelings.