Some early GBA emulators (like VisualBoyAdvance v0.9) had a bug where they would misread the file header if the internal ROM date was overwritten with a hex value of 0x07B6 (1986 in a proprietary Nintendo timestamp format). A troll release could force the emulator to display "1986" even though the game was from 2005.
1986 - - Pokemon Emerald -u--trashman- Rom
Some early GBA emulators (like VisualBoyAdvance v0.9) had a bug where they would misread the file header if the internal ROM date was overwritten with a hex value of 0x07B6 (1986 in a proprietary Nintendo timestamp format). A troll release could force the emulator to display "1986" even though the game was from 2005.