Place the chicken breasts in the slow cooker and add diced tomatoes with green chilies, corn, black beans, chicken broth, chili powder, cumin, and garlic powder. Season with salt and pepper to taste.
Cover the slow cooker with the lid and cook on low for about 6-8 hours, or until the chicken is cooked through and very tender.
Remove the cooked chicken from the slow cooker and shred it using two forks until finely pulled apart. Return the shredded chicken to the soup and stir to combine.
Squeeze fresh lime juice into the soup for brightness, then stir to incorporate.
Ladle the hot soup into bowls and top with shredded cheese and chopped cilantro for added flavor and texture.
Serve immediately, allowing the cheese to melt into the warm, thickened broth as you enjoy the comforting, chunky texture of this flavorful soup.