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Old July 29th, 2009 (7:14 AM).
jigglyppuff8's Avatar
jigglyppuff8 jigglyppuff8 is offline
Join Date: Jun 2007
Location: PA, USA :effort
Age: 23
Gender: Male
Nature: Modest
Posts: 2,326
Quoted from Bulbapedia:
Copies of Pokémon Gold and Silver typically lose the ability to save after a period of about seven years, due to the internal battery running dry (this is due to the constantly-running clock). However, the battery is replaceable with another one of the same kind, although replacing it will reset the game's data. The problem appears less often with Pokémon Crystal.
I'm pretty sure it has nothing to do with the fact that it's a fake cartridge.