The Naruto Shinobi Handbook!!

Summary
Naruto and his thousand shadow clones attack Gaara, who is unable to defend himself. All of the onlookers are completely surprised, Gaara so much so that completes his Shukaku transformation out of anger. The shadow clones are destroyed and Gaara tries to crush Naruto with sand. Still refusing to lose, Naruto uses the demon fox's chakra to summon Gamabunta to escape. Seeing Shukaku, Gamabunta has no interest in fighting, especially since Naruto has yet to earn his trust. Gamakichi, Gamabunta's son, assures his father that Naruto is a good person since he protected him from Gaara. Enraged that anyone would attack a member of his family, Gamabunta agrees to help.