I was battling some kid from SPP and we were both down to one pokemon(he was using 6 ubers vs. my 0 ubers) and it was my Yanmega and his Mewtwo. I ohko'ed the Mewtwo(non CH) with Bug Buzz. My Yanmega has a 31 Special Attack IV, and I may not have been able to do that with anything less. So yeah...