He is capable of using his power to alter the reality to his liking, with no regard for how it affects others, Janemba's intelligence also seems quite limited; the only word he knows how to say is his own name. His attacks involve things such as creating miniature versions of himself and of Goku, creating dimensional portals, and shooting ki blasts from the four holes on his belly. Janemba also seems to be playful like Majin Buu.