Uno 2 - Small World, a Nintendo Game Boy release exclusive to Japan, is a variation of the classic card game Uno. Information on its specific gameplay mechanics and differences from the standard version is scarce.  However, given the title, it likely featured a smaller game board or simplified rules, potentially aimed at a younger audience.  There is no publicly available information on which company produced or organized this particular Game Boy title.

Uno 2 - Small World (Japan)

Undercover Cops Gaiden - Hakaishin Garumaa (Japan)