Mario Bros. II

Mario Bros. II is listed here as a 1987 action-platformer for the Commodore 64. The Mario name on an 8-bit home computer at this point almost always signals an unofficial conversion or clone rather than a genuine Nintendo product, since Nintendo's own Mario games stayed on its consoles, so this is best understood as a period curiosity tied to that famous branding.

Taken purely from the metadata it is a single-screen or scrolling platformer of the kind common on the C64 in the late 1980s, of interest mainly to collectors mapping out the era's many Mario-flavoured spin-offs.