Super Mario Advance 4: Super Mario Bros. 3-e is an expansion pack in the form of separate physical cards for the Nintendo e-Reader. The cards could have new levels (Level Cards), items (Power-Up Cards) and demo gameplay from the developers (Demo Cards). It was released in bundles separated in two series. The North American version has a complete pack of the cards for each series, but has fewer cards available than the Japanese version, which were released in random smaller packs.