The Krazoa Spirits were the six peace spirits and bringers of life to Dinosaur Planet in Star Fox Adventures, who also made flow the magic of the SpellStones. After being safe in the Krazoa Palace for a million years, they were hidden all over Sauria during General Scales' attack against the Palace defending EarthWalkers, as in the wrong hands, the Spirits could bring great terror. Fox had to return them to the Krazoa Palace in order to end the war against Scales, prevent the Spirits and Sauria from dying and to save Krystal, trapped within the crystal on top of the Palace. Only those who were of pure heart can be "possessed" by the spirits until released at Krazoa Palace.
Andross, knowing that the power of the Krazoa could revive him from his previous defeat (as he was at this time a disembodied spirit), was the one who trapped Krystal inside a crystal to drain her energy and use it to control to Krazoa Spirits. Once Fox released all the Krazoa Spirits, Andross used their power to resurrect himself. Once Fox destroyed him again, the Krazoa spirits were able to put Sauria back together.
In order to obtain the Krazoa Spirits, Krystal had to pass one test before got capture by unknown force and Fox had to pass five tests. One for each Spirit:
- Test 1: Test of Observation (found inside the Krazoa Palace) (Which can only be taken under by Krystal)
- Test 2: Test of Combat (found on Moon Mountain Pass)
- Test 3: Test of Fear (found beneath LightFoot Village)
- Test 4: Test of Strength (found on SnowHorn Wastes)
- Test 5: Test of Knowledge (found on Walled City)
- Test 6: Battle with General Scales (found on top of the Krazoa Palace)
- The official Nintendo Power guide to Star Fox Adventures had stated in the Moon Mountain Pass section that Andross disguised himself as a Krazoa Spirit in order to trick Fox.
- It is unknown what the real sixth test was. It is likely General Scales had succeeded the test in order to obtain the spirit.
- It appears that the Krazoa Spirits affects the eye colors of whomever is in possession of one. The eye color differs on their moral alignment which may serve as a visual judgment of character. For Fox and Krystal, their eyes took on a shimmering violet color but with General Scales and Andross, they have yellow-red eyes with cat-like slits.
- It is unknown how General Scales managed to get a Krazoa Spirit since you had to be pure of heart in order to be possessed by one. This may have had to do with his death when he was forced to give it up.