1. Preheat oven to 425°.
2. Place a wire rack on a large baking sheet. Coat rack with cooking spray. Place cereal in a large zip-top bag; roll with a rolling pin until crushed. Place crushed cereal, rind, and 1/4 teaspoon pepper in a shallow dish. Combine juice and egg in a shallow dish, stirring with a whisk.
3. Sprinkle fish evenly with 1/4 teaspoon pepper and salt. Dip fish in egg mixture; dredge in cereal mixture. Arrange fish on prepared rack; bake at 425° for 12 minutes or until fish flakes easily when tested with a fork.
4. Combine remaining 1/2 teaspoon pepper, pineapple, ketchup, and soy sauce in the bowl of a mini food processor; process until smooth. Serve ketchup mixture with fish sticks.