Preheat oven to the pizza crust's required temperature. Place crust on a pizza pan and spread the bbq sauce evenly over the entire pizza, leaving about 1/2 inch around the edge. Sprinkle the chicken evenly over the entire pizza. Follow with the garlic powder, black pepper, onion, bacon and mozzarella cheese. Put the pizza in the oven 15-20 minutes, or until the cheese is melted and the crust is golden.