oh! I got an idea.
Maybe you can befriend a single member of each species? You name them.. then you can either invite then (one at a time) home to date and stuff? Idk. Probably just to H them. But if not at home, they become a chance encounter in the wild, where they might gift you an item they found wild roaming around, then you can H them, invite home, and maybe spar.. a mock battle that doesn't GAME OVER if you lose. They'd grow with the player. But have the same strengths and weaknesses as the wild counterparts.
Idk of that would be remotely possible.. but what. It's a thought.
(Edit: I played this a year ago and deleted it to clear space.. I don't remember much, typed this as it's unzipping, so idk if you do get game over's or whatever else I got wrong)