Originally Posted by Fat Dark Fallen Angel
Taunt is amazing on Tornadus-T, but I find Substitute to be an underrated option.
Supporting this. Too often in the endgame of a lot of battles, the opponent needs to sacrifice something to Tornadus-T so that they can bring in their Genesect to sweep, etc. If you Sub as they switch out to fodder off their, say, 25% Terrakion, then you kill it and their last-'mon Genesect can't break your Sub without eating LO Hurricane and dying. Substitute as Torn's 4th moveslot has won me a bunch of games.
Rain Dance is great as well, if your team is weak to Sun. Oftentimes, Sun teams don't have a better check to Torn-T than switching in their SDef Ninetales. If you go for a Rain Dance as they switch in, they're screwed. I remember back when my Sun team was popular, I ran an anti-my-team with Rain Dance Torn-T and it wrecked face. Give it a try.