Q: How many Night Furies are there? And if Toothless met a girl Night Fury would they be able to (~*o*~) (That was an awkward face) Repopulate? 

A: I'm not sure really. I know that Toothless isn't the only Night Fury, even though it may seem that way. As for your second question....I really don't know how to answer that. I'd think so, if Toothless liked her enough, and she liked him, but Dragons are pretty complicated...~Hiccup