Microwave a package of Orville Redenbacher’s® Popcorn per the package instructions.
Empty the package of popped popcorn into a large bowl.
Add in the crunchy corn cereal and the candy-coated chocolate candy. Toss to combine.
In a microwave-safe bowl add the mini marshmallows, brown sugar, and Dr Pepper. Microwave on high for 1 minute. Stir. Repeat. You may have to repeat this 5 or 6 times until it is the consistency of caramel.
Drizzle the Dr Pepper caramel sauce over the popcorn and serve.