In the first part (where there is lava for a field), keep a steady pace while jumping around on the stones. Hold Forward and the direction that you want to jump and collect the shuriken. Throw it at him without locking on. After throwing the full amount of eight shuriken three or four times, he will fall down into the lava. Then, he will jump up and absorb the lava. You will now have to sword fight him. The Soul Sword and Revive Rage are recommended for this. If you run at him and slash repeatedly, you are going to get hammered. The best times to attack him are when he just finishes a quick slash and when he is just about to do the non-shock wave ground pound. Hit him at those times and use Berserks and Insane Rages every time you do not need to revive.
Defeating O-Dor
Attack his belt. After you attack it twice, he will slam his fist. You can now attack it two more times before he slams you away.
Defeating Psyamon
To damage Psyamon, you will have to use your Power Bolt attack. Just shooting him with your miniguns will not effect him. Psyamon will shoot a red ball of energy at you. If it hits you, it will do a significant amount of damage. To avoid it, shoot at it with your miniguns to blow it up. He will then open his mouth and release Wraith Ranx (ghost-type Ranxs) at you. Shoot at them as fast as you can, as he will release a lot of them. When you kill one of them, your Power Bolt gauge (the gauge at the bottom right corner of the screen) will rise. When the gauge is full, you will be able to shoot your Power Bolts at Psyamon. As the battle continues, Psyamon will get much tougher. For example, after you damage him once, he will also shoot a blue ball of energy at you. If it hits you, your robot suit will malfunction, causing your movement to fail. To avoid it, shoot at it. He will also release more Wraith Ranx at you. Repeat the process five times to kill Psyamon.
Healing
If you are low on health, try to find some weeds and chop them down. Notice that your Rage Ability switch will gradually increase. Keep chopping down weeds and you will soon be able to use your "Ninja Revive" to heal yourself.
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.
Never stop falling out of the sky
Start a new game and finish the first mission that you automatically go to with Sensei. After that mission, go to the mission "Heart Attack" to retrieve the heart. You have already retrieved the heart and right eye. You will now see a little guy slightly over the rocks by the robot's foot. Talk to him. Complete that mission and get the grade. It says you must be a yellow belt to get inside the robot's foot and enter the Kyza mission to complete the level. Normally you must complete the first three missions to retrieve the robots left and right eye and his heart. After you have retrieved those parts, you should have three grades, yellow belt, and able to access the Kyza level. However, you now have three grades but only one eye and the heart. Once you get out of the level with the little guy you will never stop falling out of the sky because you cannot access the Kyza level with only one eye and heart.
Rage skills
First skill: Ninja Berserk
Second skill: Ninja Revive
Third skill: Ninja Shuriken
Fourth skill: Lightning Rage
Sword list
Notice that the sword color changes in the your belt changes.
1. Ninja's Sword
2. Golden Sword
3. Jade Sword
4. Sapphire Sword
5. Fire Sword
6. Soul Sword
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.
Various Codes
While playing, press START and enter any of these codes:
Complete Current Mission - Hold R1, SQUARE, SQUARE, SQUARE, CIRCLE, Release R1, Hold L1, TRIANGLE, TRIANGLE, Release L1, Hold R1, SQUARE, SQUARE.
Big Heads - Hold R1, TRIANGLE, TRIANGLE, TRIANGLE, TRIANGLE, Release R1, Hold L1, TRIANGLE, TRIANGLE, Hold R1 + L1, TRIANGLE, CIRCLE, TRIANGLE.
Xpower-ups
Whenever you kill an enemy in a rapid succession, the number to the right of the health bar increases by one up to 10. This represents what points you receive for killing an enemy, multiplied by the number displayed. This is useful in certain missions where a high score is required to earn the grade.
