Preheat your pellet grill to 350ºF.
In a large bowl mix together all ingredients.
Place mixture into a 13 x 9 inch baking dish and shape into a skull.
Place onion slices on meatloaf where the eyes should beand green pepper slices for teeth.
Randomly place bacon slices on meatloaf skull to look like bandages.
Bake meatloaf in your grill, covered with foil for 2 hours (drain excess grease if necessary).
Remove foil, and continue baking for another hour (drain excess grease if necessary).
Meanwhile, in a small saucepan, stir together ketchup, brown sugar, Worcestershire sauce, onion powder,and garlic powder. Put in the grill grate and simmer on low until warm. Baste meatloaf with sauce every 15 minutes during last hour of baking.
Serve with remaining sauce.