The group A: Garnet, Amathyst, Pearl and Connnie teleported to the wattermelon island. They walked for a while, but they didnt found anything. They where about to leave, but then, they heard a laughter. 

Connie: Do the Wattermelon Steven laugh?

 Pearl: No. And I think I know that laugh.

They ran, following the laugh, and when they found the origin, they saw a fusion of two gems fighting with the Wattermelon Stevens. It was Bluebird.