The Chuunin exam finals is the final of the Chuunin exams, when a Genin takes it to be promoted to a Chuunin. The five great ninja countries, and the lesser countries, hold a competition to see who has the most adequate fighters to become a Chuunin. It's basically a tourney style fight where one showcases techniques, intelligence, skill and strength. The proctors usually decide if you're made a Chuunin. You don't have to win a fight to be made a Chuunin, so this means all participants can be made Chuunin or none can.