Takua Nuva
To unlock Takua Nuva finish the game using all 6 Toa .

Extra bonuses
To unlock a bonus at the "Extras" menu finish a level with all Lightstones collected with each Toa .

Level 1 jumping lava rocks
You can't be hurt by the monsters if you stay in the middle section of the rocks. Press x twice to jump across rocks. When you get to the scorpion, jump on the scorpian's tail. Hit his tail 3 times, then his back 3 times and then hit his head 3 times and he will die.