Seem so, and are so tend to be decidedly different. As I said, should the wielder of creation magics be particularly skilled, the difference between life and its mockery is nigh indistinguishable. And, if the creatures were meant to be able to bear offspring, the distinction would only come down to matters of the soul.

[Which, he would be able to tell immediately if not for his sight being taken from him. It's pretty wild how dull the world looks through the eyes of mortals. Mayhap that is why they kill each other...]

Ah, yes. Lich, I am familiar. [So, not a true immortal, but rather some wicked creature that believes itself sapient. Well, he supposes that's better than nothing. Though, they bear a striking similarity to Ascian Primes, but if aught, they're a crude mockery.] Then consider me assured that you are not so foolish as they. 'Twould be a great disappointment if you were, what with this wonderful rapport we seem to have.

[Well, isn't that charming. Poor bird, but he supposes it will just have to get over it.]

If what you say of these Gengar and their evolution are true, then that further strengthens my resolve that these creatures are constructs of sorts. However, from your account, I may yet enjoy myself one of these devilish fiends. They do sound fascinating.