Add the both, enchilada sauce, green chilies, cumin, chili powder, onion powder, and garlic powder to your slow cooker. Stir to combine.
Carefully add the chicken to the slow cooker. Cover and cook for 7 hours.
Now and in the corn, cream cheese, and instant rice to the pot. Stir to combine. Cover and cook for 30 more minutes. You may want to give it a stir a couple of times while it cooks.
Remove the chicken from the slow cooker and shred. Return chicken back to the crock pot and stir.