Prepare the Crockpot: Place the frozen or thawed meatballs in the bottom of your crockpot, spreading them out evenly to ensure they cook properly.
Add Fruit and Sauce: Pour the entire can of pineapple chunks with juice over the meatballs, then add all of the BBQ sauce. The pineapple juice will help tenderize the meatballs while adding a tropical sweetness to balance the tangy barbecue flavor.
Season the Mixture: Sprinkle the brown sugar and garlic powder over everything in the crockpot. Use a large spoon to gently stir all ingredients together until the meatballs are evenly coated with the sauce mixture.
Cook Until Done: Cover the crockpot with its lid and cook on high for 2 hours or on low for 4 hours. The meatballs should be heated through and the sauce should thicken slightly.