Cave of Origin sound retention
Posted by: VaeporSage
Date: 2014-07-29 15:35:11
Hatching an Egg or evolving a Pokémon whilst in the Cave of Origin plays new music. As the Cave of Origin has none with which to replace it once the cutscene is over, the hatching/evolution music will continue until the player exits the room.
bulbapedia.bulbagarden.net/wiki/Cave_of_Origin
If a Pokémon evolves or an Egg hatches here, the music will play on the floor until the player leaves.