Seriously? All of this for a legality of a HQ unit in question?

I did some more research, and apparently, it's a unit from one of the imperial armor books for use in apocalypse games. No biggie.

You're not going to get this character approved for tourney play (that's ok, I avoid those like vampires avoid sunlight), but if you allow your buddy to play it in a 'friendly' game, then go for it! It's not a super unit or anything, though it would be interesting to field just to see what a unit of an XV22 and 2 XV25's both with plasma rifles or meltas could do.

Meh. Time to move on and start a flame war on Dakka...