Be warned before hand, some of Grudge Match's material may be a bit past PG.
So there used to be a site called "Grudge Match" which had you vote on fights such as "Superfriends VS X-Men","Boba Fett VS Predator,"Gary Coleman VS Webster" and many others, but they quit doing new matches a while back.
Still, they have their old matches up, and a section called "Fun Stuff" as well. One of these "Fun Stuffs" was called "GrudgeLine" where they had mostly fictional characters answer viewer mail. And looking through these old archives, I found...http://www.grudge-match.com/Fun/GrudgeLine/2004February.shtml
(StrongBad's already a fictional e-mail answerman, so this fits pretty well.)