I-NINJA CHEAT CODES
Level skip
INSTRUCTIONS
Pause the game and enter the following.
| CODE | EFFECT |
|---|
| Hold R and push X(3), B. Release R, then hold L and push Y(2). Release L, then hold and push R, X(2) |  Level skip |
Upgrade sword
INSTRUCTIONS
Pause the game and enter the following.
| CODE | EFFECT |
|---|
| Hold L + R and push B, X, B, Y(2), X, B, X | Upgrade sword |
Big Head Mode
INSTRUCTIONS
Pause the game and enter the following.
| CODE | EFFECT |
|---|
| Hold R and push Y(4). Release R, then hold L and push Y(2). Hold R + L, then push Y, B, Y | Big Head Mode |
I-NINJA TIPS & TRICKS
Mow grass
Where there are grass, flowers, mushrooms, other foliage, objects other than crates and barrels, and certain decorative objects, you can cut them down to earn a few extra points towards your main score. This is useful in the certain levels that require a high score to earn the grade.
I-NINJA UNLOCKABLES
Battle Arena
If you want unlock the Battle Arena, get every grade, then you should get the Master grade. The Battle Arena will now be open in Robot Beach.