The B Rank Missions are only assigned to to experienced ninja. With these missions you are able to unlock villians and subordinates of the most dangerous ninjas.
Win 2 battles in a row with Uzumaki Naruto. (2/2) Win 2 battles in a row with Haruno Sakura. (2/2) Win 2 battles in a row with Uchiha Sasuke. (2/2) Win 2 battles in a row with Aburame Shino. (2/2) Win 2 battles in a row with Inuzuka Kiba. (2/2) Win 2 battles in a row with Hyuuga Hinata. (2/2) Win 2 battles in a row with Nara Shikamaru. (2/2) Win 2 battles in a row with Akimichi Chouji. (2/2) Win 2 battles in a row with Yamanaka Ino. (2/2)