Dark Tournament

The Dark Tournament was originally held in the Yu Yu Hakusho universe, but the heroes of Into The Mix have been involved in it a few times.

ITM III
In Tower ITM, one of the doors around the Tower itself led to the Dark Tournament. The group discovered this far before they were able to compete, but the moment they could, they entered. The team defeated enemies like George Tatsunami the Big Magnum but did also have to fight friends and allies like Kakashi.

ITM VII
In the Gypsy King ITM, the Dark Tournament became a major plot-point in World Mongoose.

Team Men with Flavors vs. Team [Holy]
 * I'll fill it in when I can - Black
 * Blue, Srewolf and Arek v. Time Mage, Priest and Giant - Blue, Srewolf and Arek

Team Men with Flavors vs. Team [Martial Artists:]
 * Arek v. Jinx: Arek [Jinx arguably threw the fight to avoid Arek going into a deadly Buu-powered rage]

Team Men With Flavors vs. Team Hayabusa: Team Men with Flavors vs. Team Urameshi:
 * Arek v. Ancient Ship of War: Arek
 * Blue v. Ryu Hayabusa: Ryu
 * Nataky v. Ayane: Ayane
 * Firebrand v. Rachel:
 * Arek v. Yusuke: Arek
 * Srewolf v. Hiei: Srewolf
 * Mephiasu v. Kurama: Kurama
 * v. Yomi:
 * Black v. Chu : Black
 * Jeff v. Kuwabara : Kuwabara
 * v. Byako :