The main part of Yuu Yuu Hakusho is devoted to the Ankoku Bujutsukai or Dark Martial Arts Tournament. At least fifty episodes focus on this tournament. There are a LOT of characters in this section so I'll group them by the teams they fit into. We never even get to see two of the teams compete, Gokukairoku Kyou and Kydousentai who don't make it past their first fight. The other teams are: