Just wanted to put it out there, but as pathetic as the zombie may seem, a tricked iron ball/lagging tail from sableye completely cripples tornadus-t for the rest of the game. I've tried sableye out for this mission, and hes pretty dang good at it unless he gets hit with hurricane and gets confused. But in order to do this, I've had to play prediction games and get tornadus t to use superpower, make a correct switch in, or send it out while its still fresh. Suprisingly, sableye with 220 spD(as the analysis has the evs plus calm nature spread) can take a hurricane from the lo set at full or around 95-96% health, so unless it gets confused, you can cripple big bird's ugly cousin with trick. but i agree with masterful. If you need to go out at all lengths like this to kill off one pokemon, you know it needs to go.