I have the one dark-samus posted alongside an installer, a long time ago. stage1 is the original, stage2 is dark-samus' with screen-init enabled.Aurora Wright's screen init. I changed the define BRIGHTNESS from 0x39 to 0x0. https://github.com/AuroraWright/arm9loaderhax/blob/master/arm11/source/arm11.c I'm using Arm9LoaderHay to boot into it (kind of like Arm9Slelect but with the ability to use several buttons at once)
P.S. didn't work again. What A9LH do you have?
I really don't know what's going on, try loading it as arm9loaderhax.bin and see if that works.