how to you explain yao gui.they are a mutated species of bear that live in the Capital Wasteland,which is mostly desert along with the rest of the nation.so it would be perfectly reasonable to have a bear species in new vegas
The Capitol wasteland isn't a desert, it just hasn't grown back yet. Thus the "wasteland". In NV, it takes place in an actual desert, that is why it doesn't look as ruined, because its not a wasteland.
Plus, the Yo Guai are mutated from the bares that naturally inhabited the area before the war.
Yes but the bear has two heads. Which means the people of NCR Changed their one headed bear on the pre-war flag to a two-headed bear. I can't see any reason for this unless at some point there was a two-headed bear.
Lets make this clear.
The NCR are from CALIFORNIA, not Nevada. California has a large forested region where there are indeed bears. The region of Nevada that NV takes places is a desert where bears do not inhabit. Clear enough for you?