Out of stock

Gameboy 2MB, 32KB FRAM MBC3 with RTC Flash Cart (Clear flex PCB)

$89.00 USD

A re-programmable 2MB flash cartridge is MBC3 with RTC which works with Pokemon games such as Gold, Silver, Crystal and hacks such as CC and Prism. Only a few will be made from time to time.

This listing is for a special clear flex PCB version, please keep these in mind before ordering:
– Requires handing with care as it can be easily damaged
– May be some warping/imperfections/soldering marks on the PCB due to the manufacturing/assembly process
– Parts of the silk screen may be missing
– Due to the flex PCB’s lack of rigidity, the battery won’t make proper contact with the battery holder if it isn’t in a closed GB shell and thus the RTC won’t be powered
– If you order the clear resin printed riser – it will likely arrive warped due to heat so you will need a hot air gun to fix it. It only needs very low temperatures (less than 60C) for a second or two.

Included is double sided clear tape that is required to stick the back of the cart pins to the shell, otherwise the cart pins don’t make contact to the GB/GBA.

3D printed resin shells are available to order:
Bottom shell
Top shell
Top shell (no indent)

Need to flash a game on this cart? Make sure to grab our GBxCart Flasher. We highly recommend you purchase a flasher so you can backup your save and re-flash the cartridge with newer updates of games. Re-flashable with GBxCart RW. Uses FRAM so no battery is required to retain the save, the battery is only needed for the RTC. Designed and made in Australia.

Looking for other colour cart shells? Check our DMG or GBC high quality cart shell listings.

Out of stock

Email when stock is available


Will fit the following shells – DMG, GBC, Crystal (Japan/USA) and Kirby Tilt ‘n’ Tumble check the pictures. It will fit the Boxy Pixel cart shell.

This cart works on every Gameboy system – GB, MGB, GBC, GBA, GBA SP and the Game Boy Player. It also works on the N64 transfer pack for Pokemon Stadium 1 & 2.

ROM: 2MB Flash
FRAM: 32KB (Data retention of 20-50 years)
MBC: MBC3 original chip

The power consumption of MBC3 when powered from the battery appears to depend on the chip markings which is either around 2.3uA or 5uA so a CR2025 should last at least 2-3 years and a CR2032 should last at least 4-5 years. We don’t recommend using a CR2032 battery as the holder is only designed for a CR2025 battery. Only the RTC is powered by the battery so the save is retained if the battery runs dry.

The PCB finish is ENIG.

Additional information

Weight 25 g
Flash carts

Gameboy carts, Low power, MBC3 support, RTC support, Saving supported


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