I don't play the rom and don't want to play a game where I don't know where to go, but I have a new idea for a possible use of Aiming Mark: Could it be that Aiming Mark is an auto follow me in Doubles and Tripples? It sounds a little bit to good to me but the name ...
Then I would like to know the mechanics of the move Troll (or Sing a Song according to serebii). Serebii says: "If everyone sings you can use this move in succesive turns and have its power increase." Smogon move list: "Raises Base Power the more Pokemon you have with the attack."
I hope smogon is right because it sounds like a fantastic move if all 4/6 pokemon of your team know this move