| Black Soldiers |
黒い騎士団 (Kuroi Kishidan)
The Black Soldiers are the opposite of Hakuoh's White Soldiers. It consists of many members (similar to P.L.O.O.P.) and some of them are not revealed. They are led by Robby Rotten, a boy who plots to defeat Hakuoh in the tournament at the beginning of the third season.
Each of the known members of the Black Soldiers ended up being defeated by Shobu Kirifuda, Mimi Tasogare, George, and Hakuoh. However, Robby was approached by the mysterious Yumama for information on Shobu.