Super Mario 3D World was initially released on the Wii U in 2013. In 2020, a re-released version, Super Mario 3D World + Bowser's Fury, was launched exclusively on the Nintendo Switch. This updated version features enhanced graphics, new gameplay mechanics, and Bowser's Fury, a new campaign.
As of now, there are no official ROMs of Super Mario 3D World available for download on the Nintendo Switch. The game is only available for purchase on the Nintendo eShop as part of the Super Mario 3D World + Bowser's Fury package.
If you're interested in playing Super Mario 3D World on your Nintendo Switch, consider buying Super Mario 3D World + Bowser's Fury on the Nintendo eShop. This way, you'll get an exclusive and enjoyable gaming experience while supporting the gaming industry.