>>51462418Upgradable Lighthouse (ability to alter floor layout styles) using base mechanics would be pretty cool thing to have desu. Berry blender type mechanics for the cafe. Maybe a surfing pikachu type minigame with gym leader guests (imagine wake or the like as potential opponents or characters you could play as).
The beach setting gives a lot of potential for a standalone game.
Could have even something with the moomoo farm as a daily task like helping around the farm maybe a berry patch area that feeds into the cafe stuff.
Rock breaking minigame playing off the underground system in gen 4 to find items via rocks that appear daily.
Cruise ship content via the port.
Could do fishing minigame/functionality too via the docks there.
Some cite her admiration of Erika, could have some functionality with the berry system and her as well.
Damn near could make a pokemon HM hybrid game out of it with enough time/skill.
Just off the top of my head with those it'd be pretty fun to play something thats more along those lines.