Your thoughts on what this boy might be?

[coldbloodaddict]

Definitely a hypo.

I'm not personally aware of a bunch of incompatible hypo lines in ball pythons. So far as I know, it's just 'ghost' and 'desert ghost' (which really doesn't look the same), that are incompatible?

There are definitely a lot of incompatible Hypos out there...I bought two WC Hypos and both were incompatible with established lines! There are hundreds of WC hypos brought in from Africa every year...Who knows what there compatibility will be...