In a saucepan melt the sugar, peanut butter and karo syrup until sugar is dissolved and all combined. Pour cereal into a large bowl and pour mixture over and mix all together. In a cookie sheet that has been sprayed press the rice krispie mixture in the pan. Sprinkle with butterscotch chips and allow to melt, then spread out. Melt chocolate chips in another bowl and mix until all melted and pour over butterscotch mixture. Can put in fridge to set up. Cut into squares and enjoy!!