Mario Bros./Versions

Arcade Differences

 * A notable difference between the arcade version and the Famicom port is the omission of the demonstration scenes. Before a new enemy was introduced in a level, a brief scene was played in order to instruct the player how to defeat this new pest.
 * Many graphical changes were made to this version of Mario Bros., primarily due to the graphical limitations and the number of sprites that could be drawn per frame in first generation Famicom games. Fireballs are just a quarter of their original size (which makes them a little easier to dodge.) Shellcreepers and Slipice were altered to be ataller and thinner and the Shellcreeper's animation was simplified. They merely flip back over instead of hopping out of their shell, kicking it over and crawling back inside. Sidesteppers and Fighterflies were drawn in parts so that it took two full frames to draw them completely. Hence they have a tendency to flicker. Color palettes were simplified as well.
 * Two features did not make it in to the Famicom version, icicles which would form in later rounds and drop on Mario and Luigi's heads, and the bonus stages that contained invisible ledges.
 * Very late in the Famicom's life time, Nintendo released an updated version of Mario Bros. called Kaettekita Mario Bros., or Return of Mario Bros., for the Famicom Disk System which corrected just about all of the changes made from the arcade to the Famicom.