Board Thread:Questions and Answers/@comment-27179312-20150113013418/@comment-26133899-20150419221142

With a failed breeding on Shugabush Island, you may get a Shugash or you may get the "partner" monster.

If there is a rare available for Shugabush Island, you may get the rare as a result of a failed legendary breeding - much easier than breeding the rare on it's home island and transporting it.