I-Ninja Cheats

Unlock Battle Arena
To Unlock Battle Arena, earn all the Grades, Then you should get the Master Grade. The Battle Arena Will be open at Robot Beach

Level Skip
While playing I-Ninja, press START, hold R and press B, B, B, X. Release R then hold L and press Y, Y. Release L then hold R and press B, B. Sword

Upgrade
I-Ninja Cheats: While playing, press START, press pause then hold L + R and press X, B, X, Y, Y, B, X, B.

Big Heads
While playing, press START, hold R and press Y, Y, Y, Y. Release R then hold L and press Y, Y. Release L then hold R + L and press Y, X, Y.

Complete Current Mission
While playing, press START, Hold R Button, B, B, B, X, Release R Button, Hold L Button, Y, Y, Release L Button, Hold R Button, B, B.