GBA cartridges used a mix of save chips for the duration of the console's life. Super Mario Advance and Konami Krazy Racers were both launch titles. Super Mario

GBA cartridges used a mix of save chips for the duration of the console's life. Super Mario Advance and Konami Krazy Racers were both launch titles. Super Mario Advance used EEPROM with no battery while Konami Krazy Racers used static RAM with a battery. Some games even got multiple releases with different save chips. Metroid Fusion originally released with static RAM and a battery, but later cartridges feature ferroelectric RAM and no battery. As far as the software is concerned, these two function the same.