Line a baking sheet or part of the kitchen counter with wax paper or parchment.
Add cereal, Bugles, and pretzels to a large bowl. Measure M&M candies and set aside.
In a microwave-safe bowl, melt vanilla bark. Pour over dry ingredients and stir. Add in candy and stir coating all ingredients with melted bark. Pour snack mix on wax paper or parchment. Let set up for 1 hour. Break apart snack mix and store in an airtight container until ready to enjoy.