It's began when the mane six, Spike and the CMC decided to visit the changeling kingdom to had chit-chat with King Thorax. When they arrived, Thorax greet them and glad to see Spike as well

But as they concern about Queen Chrysalis might return to regain the hive because of Starlight Glimmer and King Thorax, Spike and the CMC were aware of this and decide what mean to be done, so they told them about their decision of becoming the metamorphosed changelings

After giving permission from their families, the mane six, Spike, the CMC and Starlight arrived at the cocoon chamber, where some of Metamorphosed changelings put some special cream on Spike and the CMC to speed up the transformation

After two months has gone by, until one day the four cocoons burst opened. Spike came out as a metamorphosed changeling dragon hybrid with his new wings on his back and so is the CMC as metamorphosed changelings with their wings on their back.

The mane six and Starlight Glimmer was pleased by this, and Thorax promised them that he and the other metamorphosed changelings will take good care of Spike and the CMC and train them in the ways of the changeling…