This egg was only given out for Easter 2011.
Yubbies are some of the most peaceful bunnies in Ark. They make frequent friends with Onnies and are seen collaborating with Onnies regularly. During Easter holiday celebrations, Yubbies and Onnies (along with many other types of bunnies from around Ark) will virtually overrun the City and pass out free Easter eggs and chocolate. It is also rumored that patting a single Yubby's tail 3 times in a row on Easter is a good luck charm.