Also other mysterious or bizarre sequences. I think it had a harp, maybe glockenspiel or some kind of eerie pitched percussion. Wasnt the jigglypuff one, definitely had harp
Would love to find an isolated decent length version of it
Edit:
Pokemon Unreleased English Music BGM - Sleeping
I don’t know that one, but if you just want a sleep song try Weightless by Marconi Union.
Am familiar but looking for this one for nostalgia’s same more haha