You could have used at least the 3DS version of Super Mario Maker, that has original levels that are better than those included in New Super Mario Bros. 2, but you chose the Wii U version that doesn't.
You could have used at least the 3DS version of Super Mario Maker, that has original levels that are better than those included in New Super Mario Bros. 2, but you chose the Wii U version that doesn't.