Place the cereal in a large bowl. In a medium bowl, combine the chocolate chips and peanut butter. Microwave the chocolate mixture for 30 second intervals until melted; stir until smooth.
Pour the chocolate mixture over the cereal and use a spatula to gently toss the cereal in the chocolate until completely coated.
Place the brownie mix inside a resealable gallon sized plastic bag. Add the chocolate coated cereal. Seal, then shake until cereal is coated in the brownie mix.
Spread the cereal out in a single layer on a sheet of parchment paper; cool completely until dry.
Combine the cereal, M&M's, peanut butter cups and pretzel twists, then serve.
