Gameboy 4MB 128KB SRAM Flash Cart (Low power, Perfect for LSDJ)


This re-programmable Flash Cartridge allows you to play most Gameboy/Gameboy Colour games including Pokemon (no RTC support), Zelda, Wario Land, LSDJ, etc and allows you to re-flash it with any flasher like GBxCart RW that supports the MX29LV320 / S29GL032. It also allows for some MBC1/3 games (you need to use our loader – see downloads tab) that don’t work properly on clone carts such as Super Mario Land 2, Donkey Kong Land 3, Megaman 5 to name a few.

This is the one of the lowest powered non-clone cart available on the market at ~10mA current consumption! (Tested on Pokemon Crystal start up screen). Excellent for LSDJ (consumes more power). Works with GB Studio v1.1.0 with saving if you wish to develop your own game. Check out the 1MB Ultra Low Power Flash Cart if you want even lower power consumption!

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

This cart works on every Gameboy system – GB, MGB, GBC, GBA, GBA SP and the Game Boy Player. Games that require more than 4MB of ROM won’t work.

Check out the cart comparison image to see how each cart compares to each other and the clone carts. Check this list of Gameboy games to see the ROM/RAM size and MBC type your game will have.

Comes in a generic clear or grey Gameboy cartridge with our label. 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.

SKU: N/A Category:


ROM: 4MB Flash (MX29LV320 / S29GL032)
SRAM: 128KB battery backed with a CR2032 (should last 10 years or more)
MBC: MBC5 (with MBC1/3 support using our loader) emulated with a Altera CPLD

MBC5 is the default mapper
MBC1/3 – To use these MBCs, you need to boot the game through our loader.
To see what games use which MBCs, check this list of games.

The PCB finish is ENIG, Gold fingers (on the edge connector) with a 45 degree bevel to give the maximum life for insertion/removal of the cartridge.

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 7.0.2.

Additional information

Weight 25 g

MBC5 only (for LSDJ or new games), MBC5 with MBC1/3 ROM banking (some games require our loader)

Cart Colour


Cart Label

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


Included, Not included

Pre-loaded ROM

I will provide a ROM to flash by email, Not required (LSDJ 7.0.2 will be flashed)

Flash carts

Gameboy carts, GB Studio support, Low power, LSDJ compatible, MBC1 support, MBC5 support, Saving supported


Multi-MBC Loader

Drag and drop your MBC1/3 roms to the executable file and you will be presented with a new file with “+iG_Loader” appended to the file name. You should flash this new file to the flash cart.

16 Feb 2019 – v1.0
– Initial Release


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