Mix all the ingredients for the Mexican-Style rub in a bowl.
1 tbsp. chili powder, 1 tbsp. garlic powder, 1 tsp. onion powder, 1 tsp. paprika, 1 tsp. cumin, Sea salt and freshly ground black pepper
Rub the pork meat generously on all sides with the spice rub.
2 to 3 lb. pork butt or shoulder
Optional: let the meat marinate for 12 to 24 hours in the refrigerator.
Place the pork, salsa, enchilada sauce, beef stock, and green chilies in a slow cooker and cook for 6 to 8 hours on low. Remove the pork from the slow cooker and let it rest.
½ cup enchilada sauce, ½ cup beef stock, 2 green chilies, ½ cup salsa
Strain the sauce from the slow cooker in a saucepan using a colander.
Bring the sauce to a boil over medium-high heat and simmer until reduced and thicker.
Shred the pork with two forks and place it back in the slow cooker.
Pour the sauce over the pork and toss; cook on high for 20 minutes and serve.