Almost all of my Gamecube games are scratched pretty badly and the Wii I used to verify the discs has reading issues. The only game I couldn't get to work was Sonic Heroes and an actual Gamecube doesn't even recognize it as a game anymore, so I'm with megatokyo on calling this bullshit, unless your disc is a different version than the ISO, but I don't even know if that affects it
I've found basically no issues with Devolution aside from the Wii remote that I have everything saved on occasionally not wanting to connect, and that might not even have to do with Devolution
Want a video? Tested the disc with a GC, it recognizes it but has a DRE as soon as i load it. I will download a cleanripped iso from internet and test again, but i doubt it will work.