In a large mixing bowl, combine the thawed corn, cherry tomatoes, diced bell pepper, and shredded cheddar cheese.
In a separate small bowl, whisk together the mayonnaise, sour cream, lime juice, chili powder, garlic powder, salt, and pepper until smooth.
Pour the dressing over the corn mixture and stir gently to combine, ensuring all ingredients are well-coated.
Fold in the Fritos corn chips just before serving to maintain their crunch.
Chill the salad in the refrigerator for at least 30 minutes to allow the flavors to meld. Serve cold.