This egg was only available in Egg Cave's Cash Shop Park for July 2012.
Brios eggs have the ability of taking on the form of another egg. Be sure to keep track of your Brios egg at all times, so that you're not fooled when it appears as another egg.
The Brios is a very advanced life form. On multiple occasions, the Science and Research Center in Ark City has tried to trace and discover the origins of the Brios species but has been unsuccessful. It was discovered that the Brios' DNA is the most similar to that of Pareteorsites. Brios do not have enough oddities and alien-like behaviors to be considered alien though.
Brios remain one the great mysteries of Ark.