Copy the NSP or XCI file to your Switch's SD card.
A new power-up that transforms characters into an elephant, allowing them to swing their trunks and store water.
Touching these triggers "Wonder Effects," which radically change the level—pipes might come to life, the perspective might shift to top-down, or Mario might transform into a different creature.
Supports up to 4 players locally. Online play features "live ghosts" of other players who can help by reviving you or placing standees as checkpoints. Playable Roster Super Mario Bros. Wonder Switch NSP XCI GUNC...
Files labeled with long strings like "GUNC..." or similar scene tags are often found on "repack" or ROM sites. Always ensure you are using a verified source to avoid malware. Legally, you should only use these files if you have purchased a retail copy of the game and are dumping the files for personal use.
A modern processor with strong single-core performance (such as an Intel Core i5-12400 or AMD Ryzen 5 5600X) is highly recommended to handle shader compilation.
Before proceeding with the article, it is crucial to state a : Copy the NSP or XCI file to your Switch's SD card
Beyond the Wonder Flowers, the game introduces a roster of inventive power-ups, including , who can smash blocks and spray water to create platforms; Drill Mario , who can burrow through ceilings and floors; and Bubble Mario , who generates bubbles to trap enemies and act as bouncing pads. The Badge system also allows players to equip passive abilities, such as a double jump or a grappling vine, creating layers of customization that alter the difficulty curve for veterans and newcomers alike.
NSP files are digital formats. They mimic the official games downloaded directly from the Nintendo eShop.
This article is for educational and informational purposes only. "Super Mario Bros. Wonder" is a copyrighted trademark of Nintendo Co., Ltd. Downloading or distributing copyrighted Nintendo Switch games in NSP or XCI format (including "scene" releases) is illegal in most jurisdictions unless you are dumping a copy of a game you personally own for backup purposes (where legally permitted). This article does not endorse or promote software piracy. Always purchase games from official sources like the Nintendo eShop or authorized retailers. Supports up to 4 players locally
Drag and drop your Super Mario Bros. Wonder file directly into that window.
Nintendo has a storied history of fiercely protecting its intellectual property, and it has been more aggressive than ever in recent years. In 2025, Nintendo’s legal actions against piracy reached new heights, highlighted by a lawsuit seeking a from a Reddit moderator accused of running "Pirate Shops" that distributed pirated Switch games. Nintendo argued that this amount was "nowhere near" sufficient compensation.
: The most straightforward and legal way to enjoy Super Mario Bros. Wonder is to buy it directly from the Nintendo eShop on your Nintendo Switch. This supports the developers and ensures you receive updates and any future content.