The Guardian Base is Area X, which can only be reached with a Transerver after complenting the first three missions. It is attacked by Slither Inc. after the defeat of four Pseudoroids, and the player must fight against several Galleons and Prometheus. Most O Disks are located in Area X, and the player can obtain a E Tank with Cédre and a W Tank by hitting the doll in Prairie's room several times. Aile can also change the color scheme of her clothing by speaking to one of the Guardian members. The soundtrack for this area is called Sky High - Grand Nuage.