Super Sports Challenge, released in Europe and offering an "Unl" (Unlicensed) version, suggests a game not officially authorized by Nintendo. This means it probably did not undergo the same level of quality control or official distribution. The "Plug-Thru Cart" specification indicates its compatibility with certain NES cartridge types.  The game likely featured various mini-sports games, but the specific selection remains unknown without additional documentation.

Super Sports Challenge (Europe) (Unl)

Super Spike V'Ball (Europe)