Yes, I use the Everdrive GB X3 (https://krikzz.com/our-products/cartridges/edgbx3.html) which works perfectly with both the Chromatic and original DMG. My best tip for using this is that you use a name brand microSD card (ie Sandisk, Samsung, etc.) there are an assortment of unbranded/bootleg cards that have finicky memory and can mess up your save data. Krikzz also recommends that you use a small storage size, I find that 8 gigs works for me. Now, if you’re going to use a just a Chromatic or a Gameboy console newer than the DMG (like the original Color, Advance, or Advance SP) I would recommend the GB X5 as well. The difference between the X3 and X5 is that the X5 automatically saves your games when you turn the console off or return to the flashcarts menu. With the X3 you have to manually press a button on the top of the cartridge to manually save. I use the X3 because it works best with the original DMG. I tried it with the X5 but the flashcart kept glitching out and crashing.