Place the chicken breasts at the bottom of the crockpot.
Add the chopped onion, bell pepper, and minced garlic on top.
Pour in the black beans, pinto beans, corn, and diced tomatoes.
Add the chicken broth, chili powder, cumin, salt, and pepper.
Stir the ingredients gently to combine.
Cover the crockpot and set it to low for 6-8 hours or high for 3-4 hours.
Once cooked, remove the chicken and shred it with two forks.
Return the shredded chicken to the soup and stir well.
Taste and adjust seasoning if necessary.
Serve hot, garnished with lime wedges and shredded cheese.