If he ever takes the chunnin exams , i pity those other gennins that are unlucky enough to be his opponent.
Naruto would probrably accidently kill them all unintentionally.
I mean , all of naruto techniques are not meant for sparring , they are meant for killing and severly wounding the enemy.
I mean - rasengan ( severly injures opponent to the point where they cannot even move)
- odama rasengan ( 1 hit kill if hits)
- giant rasengan ( enough said )
-rasen shuriken ( 1 hit kill if hits and even if the opponent survive, he can never be ninja again)
- mini rasen shuriken ( 1 hit kill technique)
- planetary rasengan ( another 1 hit kill technique if connects)
- sage mode ( god save his opponents , oh dear)
-kyubbi mode ( his opponenets are very , very screwed)
Any gennin who challenge him will surely die. xd