2drag1tran is the Battle Subway version of 4drags2mags. Since the cpu never switches, and that Heatran is better than our beloved Mag at taking Steel types out, he took over the spot. Although not as effective as Trick and other similar strategies, it's really fun to play. Here's a sample 2drag1tran :
Haxorus @ Choice Band
Adamant
Mold Breaker (rivalry really sucks in subway)
4 HP 252 Atk 252 Spe
-Outrage
-Brick Break
-Earthquake
-Filler
Heatran @ Shuca Berry (The cpu actually SWITCHES if it only has Earthquake and can't attack you, that's why you don't use Balloon)
Modest
Flash Fire
4 HP 252 SpA 252 Spe
-Flamethrower
-Earth Power
-filler
-filler
Garchomp @ Choice Scarf
Jolly
Sand Veil
4 HP 252 Atk 252 Spe
-Outrage
-Earthquake
-Brick Break
-Fire Fang
