QUOTE(cmal @ Jul 21 2011, 23:27)

So what's the deal with the Dragons? Is their ability to resist because of custom code, a function of their stats/PL, or from them being the testbeds for monster upgrades?
They are testbeds for monster upgrades. Specifically, they have a +50% resist stat bonus. There's no special code for them though.
QUOTE(Sayo Aisaka @ Jul 22 2011, 01:35)

Whatever extra features they have, it seems to count towards their power level.
It doesn't right now, but it might when the actual upgrade system is finished. But yeah, you can't actually make a dragon with those elemental resistances, primarily because you can't have a dragon with Holy vulnerability. Not yet anyway...