As it happens, Fun Uncle Stu has made at least two known appearances on other websites.
Fun Uncle Stu held the coveted title of Current Champ from Friday, November 02, 2007 to Friday, November 02, 2007, heartily vanquishing Screamin' Sara Jenkins to earn it. Unfortunately, brutal defeat came soon after, at the merciless hands of Over Protective Parent.
This hero's magnaminous likeness was captured at their moment of glorious triumph by Kevin .
Quotes overheard while standing in the crowd that gathered to watch the carnage…

Hurls debris at his enemies while perched atop his Ladder of Doom. I'm not even sure a normal super hero could climb that ladder, much less one with sweaty hands...