A Tsunkatse arena
Tsunkatse was a popular spectator sport in the Delta Quadrant invented by the Norcadians. In Tsunkatse, two contestants battled in an arena wearing polaron disruptors on their hands and feet, which delivered a bioplasmic charge on contact with the opponent's two target sensors, located on the sternum and between the shoulder blades. The object was to attack the opponent's sensors while defending one's own. There were four types of Tsunkatse matches: blue, red, green, and yellow. The objectives of blue and red matches were to knock out and kill your opponent respectively, however the objectives of green and yellow matches were unspecified.
In the 2370s, the sport was controlled by Penk, who captured various humanoids and forced them to fight in Tsunkatse matches against their will. These took place aboard his ship, and were transmitted live via hologram to various arenas in the sector. These fighters included a Pendari male, a male Hirogen fighter, and Seven of Nine. (VOY: "Tsunkatse")