Nantettatte!! Baseball

Expansions

SunSoft released two expansion packs for this game, which used the small cartridge entry slot attached to the game cartridge. Both of them, "Ko-Game Set OB All Star Hen", released February 26, 1991, and "Kogame Casette '91 Kaimakuban", released May 31, 1991, updated the team rosters with new stats for the upcoming season, in an effort to keep the gameplay fresh.