3rd Hokage Scroll - Beat the game once and unlock Rock Lee. Beat the game again with all A ranks and the 3rd Hokage scroll will replace the Kakashi Scroll.

Play Gambunta vs Shukaku mini game - When you are in the level where you are looking for Gaara, get Sakura and Sasuke killed. Then contiue as normal with Naruto.
When you beat Gaara in his sand shell you will play the mini game.

Rock Lee - Beat the game once

Special moves - To do some special moves do these button combinations.

Naruto

up,up,b Uzumaki Barrage
down,down,b sexy jutsu
up,down,b summoning jutsu (note: sometimes fails)
Sauske
up,up,b Lions Barrage
down,down,b Chidori
up,down,b Sharigan
Rock Lee
up,up,b Forward Lotus
down,down,b drop weights
up,down,b Master Lotus