Jaywood2010 on 10 November 2012
Honestly the show makes no sense most of the time, there is so many plot holes. It should have ended after the Buu saga. 1 of the biggest debates in DBZ is who is the most powerful which would be Spirit Gohan. Super Buu is actually more powerful than Kid Buu but Kid Buu was more dangerous than Super Buu because he didn't care if he blew up the planet. As far as Frieza and Cooler I'd say because Cooler was in a movie that most people didn't see.
