This is the easiest method. When you buy the game digitally, your Switch downloads the NSP directly. You cannot access the raw file without a hacked console, but it exists on your system.
When New Super Mario Bros. U Deluxe arrived on Switch, it brought a familiar blend of platforming precision and multiplayer chaos. What could have been a simple HD re-release instead evolved into a living arcade: a collection of meticulously designed stages, an array of playable characters with distinct movement quirks, and a multiplayer ecosystem that turns short bursts of play into memorable, sometimes maddening sessions. The game sits at the intersection of nostalgia and accessibility — a portal back to side-scrolling Mario that also invites newcomers with forgiving difficulty options. new super mario bros u deluxe switch nsp