It's hard to imagine now and a bit emotionally upsetting to remember, but side-scrolling, two-dimensional Mario platformers once disappeared for over a decade. New Super Mario Bros. was the game that brought them back, once again giving us our favorite mustached hero hopping and bopping through strict left-to-right stages. It wasn't just a return to form for Mario, though -- this DS revamp innovated new ideas that have inspired an all-new series of sequels on Wii and the upcoming Wii U. Thanks for coming back to us, 2D Mario. Please don't ever leave us again.