"Naedoko demons ground" might fit you, though it have been banned on this site for rule 7 (though with some of the recent games I feel like that would probably not be an issue anymore tbh). Basically pokemon-ish style combat, except you get monsters to fight with by being raped and impregnated by a various kinds of tentacles, which allows you to give birth to different monsters (of which some are also tentacles, but a lot that aren't a lot of different monsters you can get really). Also contains a bit of futanari, if that matter to you.
Feel free to DM me if you need some help finding the game
(I have also been working on a bit of a mod expanding on its pregnancy and customization of the monsters, though haven't made much progress in a while, so I wouldn't be waiting for that if I were you, game is still amazing on its own already)