Place the chicken breasts in the bottom of the crockpot. Season with cumin, garlic powder, chili powder, salt, and pepper.
Pour 1 cup of the enchilada sauce over the chicken.
Cover and cook on low for 3 hours, or until the chicken is fully cooked and tender. Shred the chicken using two forks.
Add black beans, corn, onion, and tortilla strips to the crockpot. Stir to combine with the shredded chicken.
Pour the remaining 1 cup of enchilada sauce over the mixture and sprinkle the shredded cheese evenly on top.
Cover and cook on low for an additional 45 minutes to 1 hour, until the cheese is melted and bubbly.
Serve warm with your favorite toppings, such as sour cream, chopped cilantro, or diced avocado.