It was my +1 CM Cresselia against his +2 CM Alakazam. My Cresselia had Shadow Ball and Moonlight, and unless Benzo's last move on Alakazam was a super effective move, it would have not been able to do crap. Why would I DC when I have a wall out? Especially when I can hit him for super effectiveness, along with a recovery move (btw, it's IV's are flawless and it's EV's are 252 HP/252 Def. / 4 SpD Bold) That's not even close to a sweep.
Here's a damage calc btw:
Damage Per Hit: 180 - 214 / 40.5% - 48.2% (Number of Hits: 1)
Critical Hit Chance: 6.3%
Chance to Hit: 99.6%
Base Attack Power: 80
+ 6 Shadow Ball against a + 5 CM Cresselia doesn't even do 1/2. I could easily PP stall him out, and this is if he even had Shadow Ball.
At most, only 1/2 of both teams were revealed at that point. I could care less if he wanted to change his team in an event for a rebattle.