Fusion  

Fuu-chan, フュージョン

The main antagonist of Pretty Cure All Stars DX and Pretty Cure All Stars New Stage is known as Fusion, who was created through the fusion of several defeated villains - Zakenna, Uzaina, Kowaina, and Hoshiina. He possesses the ability to absorb power and use it for his own purposes. In DX 3 Black Hole, it's revealed that he aimed to destroy the Cures by using powers similar to those of good and light. In New Stage, Fusion survives and transforms back into a little fairy named Fuu-chan, where Ayumi discovers him. Despite his initial plan to "Reset" Yokohama by eradicating everything in sight, he eventually stops when Ayumi reaches out to him emotionally as a friend. In the end, Fusion dies while lending all of his powers to the Smile Cures and destroying the remaining fragments of Fusion.