That's true! I think you can get by with the current sex guide for both genders -- the most complicated change is male Grovyle, but let me know if you have any specific questions and I'll try to answer them. It's usually just a 1:1 change swapping in "penis" for "vagina" or vice versa.
Viewing post in Monster Mind sex guide / puzzle guide comments
it would be nice! i have created an issue for it, maybe i will do it some day. it will be a lot of work!
the game is open source so if you'd like to do it yourself you can give it a try as well
https://gitgud.io/argonvile/monster-mind/-/issues/23