First of all, I'm all for allowing fire types to swim. I think it's silly when people have them be harmed just by touching a puddle of water. xD

One thing I'd like to request, however, is that reviver seeds don't work as a 'literally bring someone back to life' thing. I feel like they should work more like revives in the main games do, and having an instant cure for death would remove any danger or suspense the story would have. Same with a character getting a major injury or something - there shouldn't be a ton of instant healing. Gotta have some sense of real danger.

For pokemon moves, I'm fine with both limiting them to four and with having them know whatever moves their species can. Whatever most people prefer on that one.

I feel like if we decide explorer badges can teleport, there should be some limitations on it (even if it's just as simple as one time it stops working for whatever reason) so there can be dangerous situations the characters can't easily get out of.

Humans, I'm not sure right now. I'd be fine with no mention of humans at all, but it would also be kinda cool to have them be myths that are talked about in this PMD world.

I'll come back with more stuff when I think of it.