In a large bowl, stir together popcorn, peanuts, pretzels, and candy pumpkins. Spread onto a parchment paper lined jelly roll pan.
Add white chocolate chips to a microwave safe bowl and add in shortening or coconut oil. Microwave at medium (50%) for about 20 seconds and stir until smooth. If chips are not smooth, return to microwave at 10 second intervals, stirring after each until smooth. Drizzle over popcorn mix and allow to reach room temperature for the chocolate to harden before serving.