Navy Blue 98 is a Game Boy game released in Japan. This title, like its predecessor Navy Blue 90, appears to be relatively obscure, lacking widely available information. The numerical component in the title suggests it might be related to sports, military simulations, or other subjects involving a year or code.  Additional research into obscure Japanese Game Boy releases is needed to reveal specifics about the game's genre, gameplay, story, and publishing history.

Navy Blue 98 (Japan)

Nangoku Shounen Papuwa-kun - Ganmadan no Yabou (Japan)