points for bonus items
Ok so you get these different colored circles throughout the game and they are used to purchase bonus items. A good way to get a lot of red points is to scan all different kinds of lifeforms in cluding technology that has a mind of it's own like the machine turrets or the security cameras or the training drones also try scaning vehicles
More tricks, tips and cheats for this game are right here - Metroid Prime 3: Corruption cheats