3rd Hokage
Beat 3rd Hokage(board #7).
Bandits
Lose at board #3,beat Haku and the Bandits(board #5).
Haku
Beat Haku and the Bandits(board #5).
Iruka
Beat Iruka and Kakashi(last board after boars #7,check it out)
Kiri Ninjas
Lose at board #3,beat Kiri Ninjas and Sabusa(board #4).
Konohamaru(multiplayer mode)
Beat Sakura in story mode(board #2).
Konohamaru(story mode)
Beat the story mode without losing to Sasuke.
Sabusa
Directly lose to Sasuke in the running competition,save,quit,lose in the climbing competition,proceed to board #6 and beat it.
Tsunin
Lose at board #3,continue game and finish up to board #7,then beat Iruka,lastly beat board #1.