seelkadoom is a powerful hedgehog who was made by eggman combining the DNA of sonic and shadow he's from a sonic fangame called sonic rpg(no I'm not joking that's literally it's name), is egotistical and cocky he's also quite arrogant, and he's as strong as hyper sonic, he was sent to another universe by eggman after it was proven he was out of his control this world has a giant sphaire instead of the master emerald, ps the background is not what he looks like but i tried to get it as close as possible and if you wanna know what he looks like, look him up😐