Sunshine is expected to be Nintendo's second GameCube title to roll through the one million sold mark. If the game's sell rate continues, it could achieve this goal in little more than one standard week.
Mario's latest adventure is already nearing total sales of Luigi's Mansion and Pikmin, and looks to fly right by those efforts and more on its way to take on GCN's current biggest seller, Super Smash Bros. Melee.
Nintendo anticipates similarly strong sales of the platformer in the US and Europe when it is released shortly.
More as it develops.