Discovered something today which might be helpful in 100% runs.

You can unload the main map in Capital Cashino using the pigs mini game. This way, you are able to fly around freely as helicopter and collect Coins/Quills. There was a Pagie near the middle of the map, which gave me a total of 4 Pagies by collecting it (dont really know why).

1. Transform into the helicopter.
2. Start the pig mini game.
3. Fly into another area (for exampe the one near the entrance where you have to kill the enemies behind glass with Sonar 'Splosion).
4. Let the timer run out.

Your position will be set to where the minigame started but the map wont be loaded.

Can be fixed by entering the "other area" again.

Hate to say it, but it's a very, very well known glitch. It comes up multiple times a day on /r/YookaLaylee and our Discord server. :P