This is a 1:1 digital clone of a physical game cartridge. It mirrors the exact data structure of the retail card, making it similar to a "disk image".
The phrase in your search implies two things: the ability to play Super Smash Bros. Ultimate in handheld mode (which the official game already does) and the ability to carry the game files themselves from one device to another without friction. super smash bros ultimate switch nsp xci dlc a portable
: Digital installation packages similar to what you download from the Nintendo eShop . These must be "installed" to your console's storage or SD card before playing. This is a 1:1 digital clone of a physical game cartridge
files (latest versions like 19.0.1) dumped from your console to decrypt and run the game. Installation & Consolidation Methods Ultimate in handheld mode (which the official game
: Installing the base game as an NSP to a high-speed MicroSD card ensures rapid loading times on the go. Controller Configurations for Handheld Mode
Super Smash Bros Ultimate Switch: NSP, XCI, DLC, and Portable Gaming