CatFlash Mittens (2MB cartridge compatible with GameGear)

CatFlash Mittens is a 2MB reprogrammable flash cartridge board compatible with the Game Gear.

It provides 2MB of flash ROM space and includes an onboard Raspberry Pi for Sega-style bank switching. This allows it to run games beyond the standard cartridge size limit. It's fully compatible with devkitSMS banked code.

Perfect for homebrew releases, demos, ROM hacks, and development builds.

Save data can be written directly to flash, so there is no coin-cell battery to die and need replacing. The board is designed to fit inside a standard Game Gear cartridge shell for a clean cartridge look.

It can be reprogrammed as many times as needed.

Manufactured by Two Black Cats.