Lulz, the controller john doesn't interest me, nor does you doing it for him. I've been going to tournaments with broken controllers for the past 2 years. Every time I get a new one that works well, someone steals it. I was playing Kenny last night with a broken controller (the L button would randomly stick, so that my drillshines would turn into me spotdodging or rolling), and managed to 4 stock him once with his own character (Fox), and Fox is much more technical than Bowser. Adjust to the controller if it's broken, or get a new one. As I recall, Gimpy never johned about his controller to us. He just said "GG, rematch later". That's all. That's the mark of a good player, no johns, regardless of circumstances.
And there aren't a ****load of Marths that are better than Yang anymore. Yeah, the ones that are are WAAAAAAAAAAAAY better than him, and there are probably about 20 or so, but the general Marth populace sucks. Also, saying that Gimpy beats Marths that are much better than him kinda disproves your whole "Any decent Marth can own a good Bowser" theory, doesn't it?