There isn't a "deep story" behind the file name itself—it is simply a standard naming convention used in the game pirating/emulation community to catalog files. The "story" within the game, however, follows a human transformed into a Pokémon who joins an Expedition Society to uncover why Pokémon are being turned into stone.
Likely stands for "Region Free," suggesting the CIA file has been patched to work on any 3DS console regardless of its original region. PSMD-USA-CIA-RF-Ziperto.part2.rar
Stands for Pokémon Super Mystery Dungeon , a 2015 role-playing game for the Nintendo 3DS. There isn't a "deep story" behind the file
This is the file format used for installing games or applications on a Nintendo 3DS system (typically via custom firmware like Luma3DS and the FBI installer). Stands for Pokémon Super Mystery Dungeon , a
Indicates the North American region version of the game.