Azurik Available Cheats:

Save at any point
Press White, Up, Down, A, B, click Right Analog-stick. A sound will confirm correct code entry.

Big heads
Click Right Analog-stick, press R, Down, Up, A. A sound will confirm correct code entry.

Afro hairstyle
Press Down, Right, Black + White, click Right Analog-stick, click Left Analog-stick, press Left Analog-stick Right + Right Analog-stick Left, B, Y. A sound will confirm correct code entry.

God mode:
Press X, Black, White, R + L, click Left Analog-stick + Right Analog-stick. A sound will confirm correct code entry.