The planet is in danger! A group of kamikaze explosive aliens are attacking! The planet seems lost, but the scientists finally have built a weapon to fight back the menace: the bakuda cannon (Rainbow cannon). The weapon has been installed all over the world, ready to shoot its colourful bullets against the Hordes of aliens. Use the stylus for Nintendo DS to aim and shoot the coloured bullets at the aliens. Make sure to hit the alien of the same colour of the bullet, or you'll make it duplicate!