The Super Mario Bros. 2 prototype marks a rare find. The cartridge was purchased by Johan_1984 on eBay in 2005 for $350. We would like to thank Johan_1984 for his huge contributions to this page.
The following comparisons use several different versions of Super Mario Bros. 2. For more information on these versions, please refer to our SMB2 Madness special and Doki Doki Panic & Super Mario Bros. 2 comparison. The SMB2 prototype represents a true transitional phase between Doki Doki Panic and the final version of Super Mario Bros. 2.