Board Thread:General Discussion/@comment-24074103-20131204160455/@comment-679780-20131204194539

Knuckles can only do the Maximum Heat Knuckles Attack wit hthe Fighting Gloves. The glow you see from his punches in Sonic Adventure and '06 could simply be special visual effects to imply force but that's about it. The only time he is ever heated is when he is furious but that is more of a visual gag. He is not a "firebender" like Blaze is.