User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-17735225-20131013151140

Ok, I'd like to give my own theory of Golden Rajang.

Aside from the obvious DBZ reference. I believe the reason Rajang became Golden Rajang is related to the loss of its tail. Normally cutting Rajang's tail off prevent it to entering rage mode, why? I believe it's because Rajang store its electricity (from eating Kirin) in its own tail. When it's enraged, the stored electricity is released all over its body, charging up its fur and turned them gold. Noticed that they have no electric/thunder sacs on its body.

A Golden Rajang is Rajang who lost its tail in combat (possibly due to Kirin sub or Kushala), so it can't enter rage mode properly. But they survived despite having drastically reduced power, toughen up (explaining the increase in speed and power) and continue to gain an immense amount of electricity that it constantly permeate throughout its body, turning its fur permanent gold colour. It might also gain some form of control over the its power, being able to focus the electricity on its arms.

Note that some of certain normal Rajang's fur even still remains gold even after it's not enraged (You can get golden hide from carves and captures from normal non-raged Rajang).