Buuler was the result of Cooler being absorbed by Buu. His name comes from Buu and Cooler. He is extremely powerful, and is the ruler of Multiverse #5, a.k.a "Buulerverse".
Apperance[]
First Form
In his first form, he looks like Buu, with the exception that he has purple shoulders, purple head, and an tail.
Second Form
In his second form, he looks like Cooler's First Form, except that he is Pink, and has Buu's tentacle. He also has Cooler's armor.
In his Ultimate Form, he looks like Cooler's Final Form, and has Buu's Tentacle there aswell.