Congrats on the new addition! He looks very nice!

VPI axanthic is a line of axanthic. If you plan to breed him, it's important to know the line because not all axanthic lines are compatible. You can't tell by looking at axanthic BPs what line they are (and you definitely can't tell what line they are by looking at them if they're only het axanthic). In order to produce axanthics with him, you'll need a female ball python who also carries the VPI axanthic gene.

Hope that helps!