my fit kills them before that even becomes a problem. my type coverage is immense and i can never think of any problem with double team. if it did occur, i would switch in my vaporeon, super tank it, and literally wait for the opponent to run out of pp. i have pp maxxed it, and with a acid armor of sixty four pp i can outlast everything. i have outlasted a few guys in PBR in online play before. none of them waited till they struggled, they all rage quited D:
and i can gaurantee you it will go a LONG way, and even without my team please change your garchomp to use outrage. it is FAR superior to dragon rush