Sutte Hakkun for the Game Boy was never announced nor released. It had Super Game Boy enhancements.
This game dates from 1996, predating the 1997-1999 Sutte Hakkun GB, which was also cancelled. The game is a port of the first Satellaview version of Sutte Hakkun. Both this game and Sutte Hakkun GB were found in the Nintendo Gigaleak in 2020.