Gooyaan

Akudaikaan's aide. Ms. Shitataare calls him "Go-chan". His name comes from the word "gōyā (means a bitter melon in Okinawa)" and also "Echigo-ya (a shop name)". In episode 47, it is revealed that he was the one who has created Akudaikaan. After killing Akudaikaan, he transforms into a gigantic monster but is eventually defeated by Pretty Cure's Spiral Heart Splash Star in the final episode.

(Source: Wikipedia)