To defeat the Troll Super Tank you must get on high grounds, and use the bombs they provide for you... However the bombs are guarded by: Blaster Trolls, Troll Greasemonkeys, Trollverines, etc. There is a wall complete with Turrets guarding the Troll Super Tank. All you need to do is roll the mega bomb down the hill to hit the wall. However as soon as the Skylander blows up the wall, the Troll Super Tank is operational.