Place chicken breasts at the bottom of the crockpot.
Add diced onion, beans, and corn on top of the chicken.
Pour the enchilada sauce over the chicken and veggies.
Sprinkle chili powder, cumin, salt, and pepper on top.
Cover and cook on low for 6-8 hours or high for 3-4 hours.
Once cooked, shred the chicken with two forks.
Stir in half of the shredded cheese until melted, then top with remaining cheese.
Cover and cook for an additional 30 minutes until cheese is bubbly.
Serve with tortilla chips for added crunch.