[@Prince of Seraphs]

Oh, that. Ever heard of something called [url=http://tvtropes.org/pmwiki/pmwiki.php/Main/Kayfabe]Kayfabe[/url]? Essentially the whole "Iron Hulk" thing is just an act for the ring. He's a role he plays so that the audience has an enemy they can cheer a more heroic wrestler, or a "Face", can overcome. Because the real Gren might not be that great of a wrestler, but he's still plenty dangerous enough in hand-to-hand simply by not holding back, as he could easily lift his own weight without much problem, or using his semblance to really give himself an edge against his opponents. But as the Iron Hulk, Gren holds back his actual fighting powerless and instead focuses on putting on a good show for the viewers, and generally giving his opponent a fun fight. So that means relying on obviously weaker and inefficient minions (Actually stunt doubles who are really good at their job: doing dangerous things and not getting hurt for it) and using dirty tactics (Which isn't that usual for the real Gren, but his tactics and equipment tends to be far more effective. A light that is actually a laser for example, or real metal armor that you'll break your hand against) so the audience can see him as a "bad guy".

Gren is still himself, he's just playing pretend you know? Or you know, roleplaying. We're going reeeeaaaal meta now. A character roleplaying as a character in another roleplay? *Brainsplosion*

I mean, I dunno how Trad actually is as a person, though I'm sure he's a nice guy. Gren's a nice guy too I think, and they really have no reason to fight each other except for maybe a friendly spar. And while that's all well and good, it's just not the same drama as "The Evil Robot Overlord Iron Hulk is going to take over the world! Only the rough and tumble Lynchwood is there to stop him and his army of Metal Minions!" Yes that sounds ridiculously, but it's also not that far from an actual wrestling gimmick I've seen.