The whole "Black Guy this and that", "He's Powerful" translations are funny. As far as Black Culture and Dragon Ball. Yes techincally this is a show about aliens spieces from far away galaxies and planets. We do see different races because the story does take place on a fictional Earth. Of course having a Black Character on the team would be good. As I said, I did want Black to actually be Black but I know that would of been controversy because he would of been evil so I'm cool with an opposite of Goku. In a previous post I said that most Blacks probably consider Piccolo the brotha of the crew, lol.
Mr. Popo was obviously a Racial Characture. Even from the original Dragon Ball, Mr. Black even though he wasn't as bad as Mr. Popo and had a high ranking position with Red Ribbion. Still was animated with big lips and some stereotypes. Ubb came late in the game but it nice seeing him train with Goku. Some say he's more India Influence but he looks like he could be from a village in Africa. With that said, Akira knows damn well with "Super" and introducing this whole "Gods" element, Beerus influneced is clearly of an Egyptian God from Africa. Him being a Cat is a call back to that as well (And Akira own cat). Also the whole "Mutiple-Universe-Dimention-Stargate" concept also has ties to Acient Egypt/Kemet.