Mario Kart may sell more than Galaxy. The disappointing Mario Kart Double Dash on GC outsold both Super Smash Brothers Melee & Super Mario Sunshine. Mario Kart DD is the best selling GC game. In addition, Metacritic has the following reviews for Super Mario Sunshine 92 (61 reviews) Mario Kart DD 87 (58 reviews)
So not only did Mario Kart DD outsell Sunshine, but it did so with lower reviews.
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In addition, Metacritic has the following reviews for
Super Mario Sunshine 92 (61 reviews)
Mario Kart DD 87 (58 reviews)
So not only did Mario Kart DD outsell Sunshine, but it did so with lower reviews.