Must have all Heart tanks, Sub tanks full, and upgraded armor. In the 3 Sigma Level, go to the part where there's a spiked wall with an unreachable ladder. Go to the left and get a bot freeze it with Crystal Hunter and go up to the ladder. Get the life and 2 pellets and don't loose any health. Freeze the bat and air dash to the other side and spin wheel the 2 robots. Then Air dash through to the hardest part. Charge up the Speed Burner and airdash to the right and Speed Burn to the left and get the life. Slide down the left wall to the capsule. To exacute the Shiruken, FW, FW + DN, DN, FW + DN, FW, in a circular motion then press Y.
This code is for everything in the game but Sharuken.