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Gameboy 4MB 32KB FRAM MBC3 RTC Mini Flash Cart (For Pokemon games/hacks like CC, fits in a GBA repro cartridge)

$62.00 USD

This is a unique Gameboy flash cart which fits inside a GBA repro cartridge so you can play on the GBA and GBA SP without the cartridge sticking out like it does for a regular Gameboy cartridge. Because of that, this cart will only work in the GBA, GBA SP and the Game Boy Player. The GBA repro cart will need to trigger GB mode – we did this with a bit of hot glue on the bottom left side. The cartridge may have a bit of a bulge due to the battery, this is more noticeable on the clear blue/dark grey cartridges.

Need to flash a game on this cart? Make sure to grab our GBxCart Flasher.

Usually MBC3 chips only allow for 2MB of flash however by adding a special logic chip, we can extend the flash size to 4MB so you can future proof your RTC cart. Re-flashable with any flasher like GBxCart RW that supports the MBM29F033C chip via the audio pin method. Uses FRAM to keep the save so no battery is required, it’s only used for the RTC. Designed and made in Australia.

Does not include a generic cart shell as the battery makes it difficult to close on the generic types. You will need to purchase a high quality GBA cart shell which you will need to modify yourself to trigger GB mode

Questions? Jump on our Discord server where we and other users can help you or contact us via Twitter.

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This cart only fits properly in the GBA, GBA SP and the Game Boy Player. If you can fit it in a DMG, MGB or GBC then it will work too. Games that require more than 4MB of ROM won’t work.

Each unit is assembled in house and is tested on a Gameboy Advance.

ROM: 4MB Flash (MBM29F033C)
FRAM: 32KB (Data retention of 20-50 years)
MBC: MBC3 original chip

The power consumption of MBC3 when powered from the battery appears to be around 2.3uA so a CR1616 should last 2-3 years and CR2016 should last 3-4 years for the RTC.

The PCB finish is ENIG.

Additional information

Weight 15 g
Cart Colour

Light Red

Cart Modification

Yes apply the glue to trigger GB mode, I will modify it myself

Product understanding

I understand this is a Gameboy Flash cart which only works on the GBA, GBA SP and Game Boy Player

Flash carts

Gameboy carts, GB in GBA cart, GB Studio support, Low power, MBC5 support, RTC support, Saving supported


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