There has been a lot of entries of Gameboy Korean but almost all are for the Consels.
How ever here is the New Region DMG--KOR or Gameboy Korean games.
DMG-QX-KOR Qix
DMG-AW-KOR Alleyway
DMG-BS-KOR Baseball
DMG-GO-KOR Golf
DMG-ML-KOR Super Mario Land
DMG-SS-KOR Solar Striker
DMG-TN-KOR Tennis
DMG-TR-KOR Tetris