Tothe best of my knowledge, the only crosses that we have seen so far are as follows:
Snow (Axanthic x Albino)
Axanthic Spotnose
Axanthic Woma
Axanthic Pastel
Axanthic BumbleeBee
Axanthic KillerBee
I am betting that we will soon see an Axanthic Pin, Axanthic Spider and a True Ghost.