Pulled Pork with avocado

2.5 pounds boneless pork shoulder roast or pork butt 2 cups fresh salsa from the store...plus more for serving 2 Tbsp chili powder 2 Tbsp unsweetened cocoa[...]

1 pork tenderloin (I used a 2 lb one) 1 yellow onion , just cut into large rings 1 tbsp garlic 1 tbsp lime juice 2 tbsp cilantro (dried or fresh) 1 tbsp[...]