Here is a video of a person who played New Super Mario Bros. 2 for three days straight in order to achieve the 1,000,000 coin goal that serves as the 3DS sequel's metagame. What fabulous prizes lie in wait for those who have worked so hard? What wondrous rewards shall Nintendo lavish upon the dedicated?
Watch the video and find out! You'll get your answer at the 5:30 mark. I think you'll agree, three sleepless nights and blistering thumbs are totally worth such an utter treat.