Talk:Kenkou Cross Q&A/@comment-25255461-20150119034009/@comment-187.252.183.146-20150120171015

OK serious answer:

Depends on the girl. some (very few) mons could follow something akin to, well, for a lack of a better term, a pokemon evolution (but gradual, no flash transformation).

Zombies, for instance, can go from shambling, mindless corpses, to lifelike, to full blown wights (IIRC from their entry)

Imps (iirc) can become arch-imps with enough energy

Succubi start from lesser, to normal, on the extreme cases (like being sired by the DL/ML and the strongest hero ever) become Lilim, or are close enough.

It would make sense if it was possible for witches to become litches.

other times they are just 'variants' like the hobgoblins, nureango, echidna, Cheshire cats etc.