If Ditto Prism Star in play, it cannot be evolved into ANY Stage 1 Pokemon with Pokemon Breeder's Nurturing, since you'd be restricted to Pokemon that specifically said that they evolved from Ditto (which no Pokemon does to my knowledge) is that correct?
The main takeaway is that it won't work, but... if Ditto DID have something that evolved from it, couldn't you use PBN to evolve it? I wouldn't expect Ditto's ability to negate other ways of evolving it (again, assuming that such a Pokemon existed).
