>>56142628Any electric type island is going to end up being "the Raichu island" because of their ease of access from the start of the game, but yeah those are suitable combinations.
I would also suggest Electric / Bug / Steel for a Chargestone Cave type environment, which would leave Ghost / Poison / Dragon as the remaining environment for what could be ruins akin to those littered around Paldea, or the Coronet Highlands.
All of the locations have to be some type of geographical term.
We've had Isle / Grassland, Beach, Hollow, Tundra, and Lakeside so far.
A hollow is also known as a sunken lane, and is a naturally occurring geographical feature where there is a natural sunken divide in landmass. They are often formed by erosion such as running water that has since stopped, or traffic.
Features like caves or highlands seem suited to the remaining types.
Particularly, highlands below a mountainous area could be rich in metals and would be good for steel types, and caves would be good for ghost types, contrary to my earlier suggestions.
The theming needn't be perfect anyway. Like, why does a tundra feature normal and dark types?
