Jet Force Gemini
Lupus The Thief
During the opening cinema when you start a new file, you'll notice that when Lupus gets ready to fly in his ship, the TV screen to his left says Juno on it. Interesting, eh?
Contributed by Schuyler
Disappearing Lupus
Choose Lupus as your character. Now go to Space Station and jump on the yellow wall on the spacecraft at the very beginning. Now jump off and hover as far away from the space craft as possible. If you get far enough, Lupus should disappear.
Gliding Vela
While in multiplayer mode, run up against the side of the wall and strafe at the same time. I performed this trick in Rith Essa Mine.
If you do it correctly, Vela or whatever character you use will look as if they are gliding.
Rainbow Color Blood
If you collect 100 alien heads, the cheat "Rainbow Blood" will appear. This will turn all blood multiple colors.
Lupus can Howl
While playing as Lupus, press C-Down.
Jet Force Gemini Kids Mode
Collect 200 hundred alien heads to turn the Juno and Vela into kids.
Ants into Pants Mode
Collect 300 alien heads to turn the enemy bugs into fat little stick figures. If you don't know, Mr. Pants is from Rare's official website, Rareware Useless, but fun.