Spray 9X13 Pan with non-stick cooking spray. Spray large microwave safe bowl with non-stick cooking spray.
Add marshmallows, margarine, peanut butter, corn syrup, and chocolate chips to the bowl and microwave stirring every 30 seconds until smooth and melted (about 2-3 minutes).
Pour the cereal into the melted mixture and mix with a spatula that has been sprayed with non-stick cooking spray. Once evenly coated add the candy corn and additional marshmallows.
Once evenly mixed place mixture into the prepared 9X13 pan and flatten out.
Melt some candy melts or almond bark and drizzle over the top for a nice finishing touch.