Final Edit: After pondering, I've decided that this doesn't really matter to me. Upon re-reading my post, I realize my memory of the incident is shaky, thus not as reliable as I would hope for. I have removed the offender in question from my post to protect his identity. I apologize for taking up forum space, and feel free to disregard the following post -- unless you feel it warrants action, in which case you can PM me for the name (if you are a mod, of course).
I'd like to report <removed> for DC'ing.
Early in the battle my Togekiss used Tri Attack on his Gastrodon, and it froze him. I decide to use this opportunity to set up on him with my Kingdra, so I send Kingdra in. He switches out and I Dragon Dance and proceed to KO one or two of his Pokemon (One of which was a Gliscor -- I cannot recall the other, which may have been Vaporeon, hence "one or two"), he sends in Vaporeon who takes an Outrage and roars Kingdra away. This forces my Togekiss out. I KO his Vaporeon and he sends out the frozen Gastrodon, I send Kingdra out, set up with DD, Outrage, KO his Gastrodon. That is when he DC'ed.
While it is unfortunate his Gastrodon became frozen, he could've chosen another Pokemon to prevent me from setting up with Kingdra. I was just taking advantage of the circumstances. I tried contacting him through a private message, but after 12-15 min of waiting he logged off.
Edit: Glancing at his profile, it seems this is not the first time he has DC'ed.
Edit 2: Also, let me add that I had 5 Pokemon left, compared to his 3 or 4 (And one of those Pokemon was the frozen Gastrodon).
I'm afraid I cannot recall his lead Pokemon, but I am fairly certain I KO'ed it after my Aerodactyl lead was knocked out. If not, that is when he switched into Gastrodon. I am trying to convey as much information as possible, but at the time I was eating dinner and battling at the same time, therefore hindering my memory. This is why I cannot cite the events with clear conviction, but what I do know for sure is that I had 5 Pokemon to his (at most) 4 Pokemon.
Basically, the summary of what I am saying is this: He DC'ed while I had the advantage.