If the player installs external NES ROMs onto the Controller Pak and selects the "Save a Letter" option at the Post Office, the game will bring up a unique menu for viewing and deleting the ROMs. Because Nintendo never officially implemented a means of installing NES ROMs onto the Controller Pak, this menu goes unused in normal gameplay. The menu is also absent from Animal Crossing and Dobutsu no Mori e+, due to the player being able to delete the ROMs directly from the GameCube's main menu.

Additionally, in the iQue version, the menu's text is corrupted, with the title appearing as garbled characters and the rest of the menu being in Japanese.