[machan1985]

I am working on getting the Metroid II EJRTQ Color hack onto a real cartridge. Original B&W as well as previous color hacks play successfully. However, the wonderful EJRTQ hack displays janky and incorrect graphics, rendering it unplayable. I am using a FlashBoy device to write it onto the cart, as well as GB Cart Flasher 1.1 as software. The ROM functions properly on emulators. Any advice?

[zfreeman]

EJRTQ colorization uses the MBC1 memory controller.

https://www.romhacking.net/forum/index.php?topic=27834.msg375476#msg375476

Blocking access to RAM banking for MBC1 games usually solves corrupted games.

https://www.insidegadgets.com/2018/08/12/building-a-2mb-mbc5-gameboy-cart-part-3-pcbs-arrived-adding-some-mbc1-support-and-troubleshooting-a-few-games/

[Chronosplit]

Strange, it works fine on my everdrive without any issue.

[IAmCaptPlanet]

did you make sure it was the 1.3 patch?

it was updated for real hardware,

(i used to have issues getting it to run on my homebrew Wii, but the update saved it)

[zfreeman]

From what I understand, the patch's incompatibility is only with older flash carts (e.g. ElCheapoSD <2.0, Drag'n'Derp, USB 64m smart card, etc.) that do not implement the MBC1 mapper properly.