Tyranitar hits
turn 1: T-tar attacks, Garchomp Attacks, Hitmontop Fakes-out, Abomasnow comes in
Turn 2: T-tar attacks, Garchomp Attacks, Hitmontop can't fake-out, Abomasnow dies...
either way, Garchomp would kill you. Garchomp isn't afraid of hitmontop, and so F-blasts the 2nd poke (ChainChomp)
and T-tar can attack all it likes. Using Fire-Punch for equally SE/OHKO damage...
either way, you can't beat it. Even when changing the weather...