Not just any Mario 3 though, this is the enhanced version Super Mario Advanced 4 version that used the e-Reader to enhance the game with game play elements from the other games such as the ability to pick up vegetables from Mario 2 and the cape from Mario World.
It makes you wonder if the programming for all of these additions are already in the game and unlocked or are really being added by e-Reader. My bet is on the former which would mean an enterprising and ingenious person could make some amazing level creation tools.
