Plot: Battle Rush: Build Up Robot Tournament is a Japan-exclusive video game for the Nintendo Family Computer. The game was one of six that required Bandai's Datach System in order to operate. Wikipedia
Plot: Shin Moero!! Pro Yakyuu was a 1989 Nintendo Entertainment System traditional baseball simulation video game. No attempt was made to release the game in Australia, North America, Europe, or anywhere else in the world. Wikipedia
Plot: J. League Super Top Players is a soccer game for the Family Computer, utilizing the Datach Joint ROM System, which was the barcode reader accessory sold separately. Wikipedia