Those "counters" have been mentioned many times. If Garchomp SD's on the switch to your skarmory, he'll 2hko if its a life orb variant(im not sure) while the best your Skarmory can do is whirlwind it, it only took it out of the battle, it's still going to be a threat and now he knows you carry Skarmory.
You can't rely on Dusknoir's 70% accuracy move, especially when there is sand veil around. And Dusknoir won't like eating a +2 outrage/earthquake AT ALL. Breloom has solid counters. Cresselia, bronzong, celebi, etc can switch in and set up reflect, celebi even resists his stab and can nail him with stab psychic. Breloom is nowhere near as powerful as garchomp, even when "passed an SD."
You can't rely on Dusknoir's 70% accuracy move, especially when there is sand veil around. And Dusknoir won't like eating a +2 outrage/earthquake AT ALL. Breloom has solid counters. Cresselia, bronzong, celebi, etc can switch in and set up reflect, celebi even resists his stab and can nail him with stab psychic. Breloom is nowhere near as powerful as garchomp, even when "passed an SD."