@anty208: I honestly don't see what Whirlpool does for Garchomp. For starters, nothing that you can set up on is going to stay in to let you set up anyway, so your opponent will just switch out before you get the chance to trap their Pokémon with Whirlpool. I mean come on, what are the chances that someone is going to keep their choice-locked 'mon in so you can trap them, unless they overpredict or make a misclick? The only trace of utility Whirlpool has is to stop your opponent from double switching after they get hit by it, but even then Garchomp has much better options to use in that moveslot. The reason Heatran's trapping set worked is because it tends to lure out Politoed, which it can trap with Magma Storm on the switch-in and use Sunny Day followed by SolarBeam to take it out. On the other hand, Whirlpool does nothing to help Garchomp beat its usual checks/counters.