Ironically, "Super 3D Noah's Ark", a bible inspired game, was one of such games, but for the SNES.
The required you to put a licensed catridge on top of the game catridge, and the unlicensed catridge would piggyback on the licensed catridge for loading.
The required you to put a licensed catridge on top of the game catridge, and the unlicensed catridge would piggyback on the licensed catridge for loading.