The phrase you provided refers to digital distribution files for , a 2014 platforming game for the Nintendo 3DS. These files are used primarily with custom firmware (CFW) or emulators to play the game without a physical cartridge. Technical Overview
These are raw images of the game cartridge, typically used with 3DS emulators like Citra or for "flashcarts". Kirby Triple Deluxe 3DS ROM & (USA) CIA (Region...
These files are used to install games directly onto the 3DS home menu, appearing as native digital titles. The phrase you provided refers to digital distribution