Line a large baking sheet with parchment paper and set aside. In a large bowl add both types of cereals and pretzels; mix to combine. Separate mixture into two bowls.
In a microwave-safe bowl, melt the semi-sweet chocolate in 30-second intervals stirring in-between each. Spread the chocolate onto half of the cereal & pretzel mix and combine using a rubber spatula. Once all cereal/pretzels are coated, transfer to the baking sheet and spread on half of the sheet. Add Christmas sprinkles and place the sheet pan in the fridge. Repeat the process with the white chocolate and the other half of the cereal mixture.
Once the white chocolate portion of the mix is sprinkled, place it on the baking sheet to chill. It will take about 15 minutes for the chocolate to harden.
When both the chocolate and white chocolate coated cereal is hardened, gently break the cereal bunches apart. Mix in the marshmallows, peanuts, candies, and chocolates mix to combine and place mix in airtight container. Enjoy!
Nutritional values may vary and are meant to be a guide.