The phrase refers to acquiring a digital copy of the Nintendo DS game “Mario Kart DS” in a ROM (Read-Only Memory) format. Such files are often obtained for use with emulators, software that allows one system to behave like another. An example would be finding a file intended to run “Mario Kart DS” on a computer or mobile device rather than the original Nintendo DS handheld console.
The accessibility of these files allows individuals to experience classic games on different platforms. The historical context involves the rise of emulation as technology advances and as older gaming systems become less readily available. It allows for preservation and broader access to these games.