Preheat oven to 350 degrees.Mix together cream cheese and sour cream until smooth and creamy. Add garlic powder, oregano, and red pepper and mix until combined.Spread evenly in a 9 inch pie dish. Pour pizza sauce over top of mixture. Top with green pepper and pepperoni.Bake for 10 minutesRemove from the oven and sprinkle the shredded cheese on top. Bake for an additional 5 minutes or until the cheese is melted.Serve warm with tortilla chips or bread.