Nintendo 64 Controller Pak [EU]

The Controller Pak is the memory card of the N64.; Certain games allowed saving of game files to the Controller Pak, which plugged into the back of the Nintendo 64 controller (as did the Rumble and Transfer Paks).; The Controller Pak was marketed as a way to exchange data with other Nintendo 64 owners, since information saved on the game cartridge could not be transferred to another cartridge.