Thread:Ultimatesonic91/@comment-26152424-20150702122929/@comment-4220590-20150702125500

According to Sonic 4's website, Knuckles pulled a "cheap shot" on Super Sonic when he reverted Sonic. I don't know what that means, but it must means something that bypassed his vulnerability. I cannot conclude something, but maybe he caught him off guard, maybe he knew a secret spot to strike or maybe he scared him out of that form.