Optional but yields the best result: heat a large skillet over medium-high heat and add about 1-2 tablespoons olive oil. Sear the pork on every side (about 2-3 minutes per side) until golden brown before adding to the crockpot.
Add pork to crockpot with onion powder, garlic powder, paprika, salt and pepper. Add beer and 24 ounces of barbecue sauce. Cook on low for 8 hours, tossing once or twice if desired. After 8 hours, shred pork with forks or kitchen tongs and add remaining barbecue sauce. Toss pork to coat and let sit for 10-15 minutes before serving to absorb everything. Remove bone (if bone-in) before serving.
I made the mango salsa about 2 hours before serving and the crispy onion straws about 1 hour before. To assemble tacos, place pork in the center of the tortilla and top with a drizzle of barbecue sauce if desired. Add on cheddar, then onion straws and then a big spoonful of mango salsa. Eat up!