In a large bowl, beat the softened cream cheese, 2 cups of shredded cheddar, green onions, smoked paprika, garlic powder, and onion powder until smooth.
Form the mixture into a tight ball and roll in the crushed Doritos, chopped pecans, and remaining 1/2 cup of finely shredded cheddar.
Wrap the cheese ball tightly in a double layer of plastic wrap. Tie 4 pieces of kitchen twine around the ball vertically to create 8 pumpkin ridges.
Refrigerate for at least 2 hours (or overnight) until firm.
Cut off the twine, unwrap the plastic, press the bell pepper stem into the top, and serve with crackers, pretzels, and apple slices.