Fusion

The main antagonist of Pretty Cure All Stars DX and Pretty Cure All Stars New Stage. As his name suggests, he is a fusion of the vanquished Zakenna, Uzaina, Kowaina, and Hoshiina and has the ability to absorb power and make it into his own. In DX 3 Black Hole revealed that he created Fusion to fulfill his plans on destroying the Cures, who resembles the powers of good and light.

In New Stage, he survives and retrogrades back to a little fairy named Fuu-chan, where he is discovered by Ayumi. After he attempted to "Reset" Yokohama by eradicating everything in sight, Ayumi begged him to stop by reaching her true feeling to him as a friend. He then dies by lending all of his powers to the Smile Cures and destroying the remaining fragments of Fusion.

(Source: Wikipedia)