Arnold's Special Passenger - S1.E12

It's the last day of school before Christmas and everyone is looking really forward to the holidays, well, almost everyone apart from the some of the buses who complain that they'll have extra passengers to pull! Later it is learnt Father Christmas will be coming to visit Chumley and soon all spirits are brightened for whom is grumpy. But who will be the bus to carry the jolly old man in red?