Preheat oven to 250 degrees Fahrenheit. Line a large cookie sheet with parchment paper or foil and spray with cooking spray and set aside.
In a large bowl, mix together the Bugles, pretzels, and cereal. Set aside.
In a small bowl, mix together the melted butter, brown sugar, and vanilla. Mix until combined. You want it a bit runny to easily pour over the cereal mixture.
Pour the sugar mixture slowly over the cereal mixture while stirring to coat all the ingredients well.
Spread evenly on the prepared cookie sheet. Bake for 30 minutes, stirring halfway through. Remove from the oven and let cool completely.
Pour into an extra large bowl and add the candies. Mix well and serve.
Store in an airtight container at room temperature.