rawmeatcowboy writes: "If you created stages you absolutely loved in Super Mario Maker on Wii U or 3DS, we're sad to tell you that those stages will stay put on the platforms where they were created. Nintendo confirmed that stages created in Super Mario Maker Wii U/3DS cannot be played or imported into Super Mario Maker 2. This is due to the inclusion of multiple new features and items in Super Mario Maker 2.
LBP2 & LBP3 also included various new features, but you could still play various uploaded levels from the previous games within them