Suggested by Destroyer The BioLizard is one of the strongest Sonic villains out there. He was originally meant to be the Ultimate Life Form until Shadow showed up and the scientists scrapped their plans. He’s not the kind of opponent that you want to underestimate. He has a large array of lasers and other powerful attacks that will send Knuckles packing. Mecha Knuckles is fairly sturdy, but there’s just no way he could handle this onslaught of attacks. The BioLizard wins.