After you've completed (or not - it depends on you) all the Ally Events and tasks from the Employment Office, it's time to take part in the final round of the C Rank ninja tournament. Go back to C Rank Tournament Reception again to begin the final bout.
This round brings nothing new - nothing new unlocks, there are no new mechanics or mechanisms to use on the arena. Go through the three rounds of this round and finish with the highest amount of Battle Orbs, and you will finish the C Rank Ninja World Tournament. Afterwards, you will be given a choice of one of three rewards:
- Character: Second Tsuchikage (Edo-Tensei)
- Accessory: Choji Mascot + Shikamaru Mascot
- 30,000 ryo
The choice, as always, is yours - although there's really no point in taking the character reward, as all of the fighters in the game unlocks with money (ryo) gain, meaning that you will unlock the character sooner or later. The best choice is money, or, if you want, the accessory set. If you, however, want to gain access to the new character as soon as possible, you can take the first reward.
Afterwards, you will see a series of cutscenes, and you will be transferred back to the main menu. You've unlocked the B Rank ninja tournament, as well as have gained access to Rank C Challenges (you can start them at C Rank Tournament Reception). Go to the next chapter to continue your journey with the ninja tournament.