to faer it sounds like it could be a fun archipelago for longer asyncs, of course, first fae would want to 100% pokopia before actually making such a manual
(there are a lot of mechanics in pokopia fae wouldn't want to be spoiled about, even if fae technically beat the game already, and well, writing a manual would require learning about them all)
the way fae thinks such an archipelago could work is that you get items that unlock habitats, use moves, use specialties, access to areas, allow use of camera, bag upgrades, and pp ups
checks meanwhile would be challenges and requests