Power Stars are collectible items that can grant Mario access to more levels in-game, unlike the regular Stars, which give only limited invincibility. It has been subtly hinted over and over that Power Stars may make Mario stronger. In Super Mario 64, Super Mario Galaxy, and Super Mario Galaxy 2 when the star for any given level has been collected, playing the level again will turn the Star into a transparent version of itself. This Star can be collected, but it will not add to the player's total Star count. In Super Mario Sunshine, they are replaced by Shine Sprites. In all, there are 754 Power Stars in these four games combined.