well as most people have said, nintendo needed way more advertising, the only advertisement i saw was for Luigis Mansion now that convinced me to buy only because i like Luigi and thought it was a cool commercial, but it was also kind of dull, as in not much adventureous, shooting dull.
When i saw an xbox commercial it was very "alive" so to speak, and looked cool, so if Nintendo's very few commerials maybe looked better too and had better games like Melee up for advertising they might of done better....