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Gameboy 1MB 128KB SRAM Mini Flash Cart (fits in a GBA cartridge for GBA/GBA SP)


This is a unique Gameboy flash cart which fits inside a GBA repo 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 repo cart will need to trigger GB mode – we did this with a bit of hot glue on the bottom left side.

This re-programmable Flash Cartridge is MBC5 only and with 128KB of SRAM is perfect for LSDJ users but please note the battery life is around 2-3 years. This cart allows you to play most of the later released Gameboy/Gameboy Colour games including some of the Pokemon games (no RTC support), Zelda DX, LSDJ, etc and allows you to re-flash it with any flasher like GBxCart RW that supports the MX29F800C. Designed and made in Australia.

Works with GB Studio v1.1.0+ with saving if you wish to develop your own game. Check this list of Gameboy games to see the ROM/RAM size and MBC type your game will have, you would be looking for MBC5 games but most MBC3 games should work and some MBC1 games may work.

Special options:
– Custom boot logo which takes 16KB, if your game takes up the full 1MB flash, the last 16KB bank will be overwritten. The custom boot logo works on the GBA 40pin. The original boot logo will appear on these devices: GBA 32pin and GBA SP.
– 8KB RAM locking useful for MBC1 games like Donkey Kong Country 3.
Check which jumpers to bridge with solder here.

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

This cart only fits properly in the GBA, GBA SP and the Game Boy Player. If you can fit it on a DMG, MGB or GBC then it will work too but it won’t fit using the GBA cartridge shell. Games that require more than 1MB of ROM won’t work.

Comes in a variety of GBA repo cartridges colours. Each unit is assembled in house and is tested on a Gameboy Advance. You can supply the ROM file for us to flash the cart if you like, it will be tested for 20-30 seconds to ensure it works.

DHL users: We are able to send this cartridge with the battery installed, only a maximum of 2 cartridges can be sent with the battery pre-installed.

SKU: N/A Category:


ROM: 1MB Flash (MX29F800C)
SRAM: 128KB battery backed with a CR1616 (should last 3-5 years)

Most MBC3 games should work.
MBC1 games that won’t work: Any that needs 32KB RAM or requires more than 512KB of ROM.

The PCB finish is ENIG.

When you place an order, if you would like the flash cart to be programmed with a ROM, you need to supply it to us via email (you can reply to your order notification). It will be tested for 20-30 seconds on a Gameboy Advance to ensure it works, if it doesn’t work, we’ll contact you. If you don’t specify a ROM, it will be loaded with LSDJ Stable 8.5.1.

Additional information

Weight 15 g
Cart Colour

Clear, Dark Grey, Clear Blue, Clear Red, Light Red, Clear Green, Green

Cart Label

Yes, Include separately so I can place it later, Not required


Pre-installed, No, I will supply and solder my own

Cart Modification

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

Pre-loaded ROM

I will provide a ROM to flash by email, Not required (LSDJ 8.5.1 will be flashed)

Product understanding

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

Flash carts

Custom boot logo, Gameboy carts, GB in GBA cart, GB Studio support, Low power, LSDJ compatible, MBC1 support, MBC3 support, MBC5 support, Saving supported


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