In a large resealable bag, combine frozen popcorn chicken with melted butter and garlic powder. Spread chicken onto large baking sheet and bake according to package instructions.
Next in a large mixing bowl, combine the cooked chicken with cooked pasta. Stir in Marinara sauce and Parmesan cheese.
Pour into a greased 2 1/2 quart baking dish. Top with mozzarella cheese and bake at 350 degrees F for 15-20 minutes or until cheese is melted and sauce starts to bubble.