Before Mario and Luigi were ever super, they starred in a platforming arcade game in 1983 simply called Mario Bros. The plumber brothers were asked to check out the rumors of monsters in New York's sewers, and upon finding said monsters, they had to defeat them by jumping on them (only if their backs were turned) or bumping them from a platform below. Players could work together or against one another in clearing each phase, and each phase becomes increasingly more difficult. If it sounds familiar, this game was incorporated into Super Mario Bros. 3 as a versus mini-game between players.
On May 8th, this classic game will go to the 3DS eShop in Japan.
There is no official word on the old school game heading to the West, but given Mario's popularity virtually everywhere, surely it will go to other regions soon. I hope so, as I have very fond memories of playing this game with my cousins for hours on end.