Jet Force Gemini
Rainbow Blood
To unlock the Rainbow Blood cheat collect 100 ant heads.

Jet Force Kids
To gain access to the Jet Force Kids cheat collect 200 ant heads.


 Rainbow Blood
 Jet Force Kids
 Ants in Pants
 Change Characters
 On Map Screen

Ants in Pants
To open the Ants in Pants cheat collect 300 ant heads.

Change Characters On Map Screen
Not really a gameplay tip but this feature isn't mentioned in the manual, so we figured we should include it. There is no need to go to the Character Screen if you need to quickly change characters when selecting a new world to fly to. You can change your character on the map screen, too. Simply use the C Buttons to switch the player icons in the corner until you've got the character you want.
Credit Goes To:IGN 64