DreamWinkle writes "It might seem unlikely considering that Mario was born and developed in Japan by Japanese minds, but America forever changed how our favorite plumber played. Why? Because Nintendo thought the U.S. and European gamers couldn't play. As a consequence, they never released the real Mario 2 outside of Japan because it was too hard, and instead released Doki Doki Panic with the Mario name. Since then, the entire Mario franchise has picked up traits from Doki Doki Panic, like the card game at the end of each level in Mario 3. This article takes a look at what elements really belong to Mario and what belongs to Doki Doki Panic. It's interesting to see that, point for point, Nintendo changed almost nothing about Doki Doki Panic before releasing it in the states and Europe as Mario 2."