Preheat the oven to 350 degrees Fahrenheit. Spray a 9 by 13 baking dish with cooking spray and set aside.
In a large bowl combine the chicken, BBQ sauce, cooked bacon, and onion.
2 cups shredded chicken, 1 cup BBQ Sauce, 6-8 slices bacon, 1/4 small red onion
Place the hard shell tacos into the baking dish. (This works best by lining up 8 in a row and then placing the last two on the side of the 8 lined up.)
10 hard taco shells
Divide the chicken mixture between the taco shells. Combine the shredded cheeses and then divide them among the tacos, topping them.
1 cup cheddar cheese, 1 cup Monterey Jack cheese
Bake for 10 to 15 minutes until the cheese is melted and bubbly. Top with cilantro and pickled jalapenos.