Died at 43 wins because I'm stupid:
Gyarados @ Lum Berry
Adamant, 212 HP / 16 Atk / 180 Def / 100 Spd
Waterfall
Earthquake
Ice Fang
Dragon Dance
Garchomp @ Life Orb
Jolly, 252 Atk / 252 Spd / 6 HP
Earthquake
Dragon Claw
Aerial Ace (to hit anything with evasion moves)
Swords Dance
Heatran @...