Here are some pokemon that I might use
Dialga, Lvl 47: Metal Claw, Ancient Power, Dragon Claw, Roar Of Time
Abombasnow, Lvl 40: Wood Hammer, Mist, Ice Shard, Giga Drain
Empoleon, Lvl 44: Metal Claw, Rock Climb, Waterfall, Surf
Garchomp, Lvl 50: Earthquake, Dragon Claw, Sandstorm, Crunch...