Hey there @SaturdayLemon, that's a great question. I decided to go through the adventure again to compile a list of currently known species paths. Some of these paths are simply shop discounts, which I've labeled, but the first four are side quests. Eventually each species will have its own path, but at the moment there are eight that I know of.



As for the Hidden Oasis, there's nothing there currently, but there are plans for it.

Please let me know if anything I said was confusing or if you have more questions! ^^