Place the pork roast in the bowl of a slow cooker and season with salt and pepper.
In a medium bowl, combine pineapple juice, ginger, paprika, minced garlic, brown sugar, soy sauce, ketchup, apple cider vinegar, and sriracha. Whisk to mix.
Reserve 2 cups of sauce and pour the remaining sauce over the pork roast.
Top the roast with crushed pineapple.
Cook on low for 6 to 8 hours or high for 4 to 5 hours.
When roast is finished cooking, place reserved sauce in a small saucepan and bring to a simmer. Simmer for 10 minutes or until sauce begins to thicken.
Remove meat from slow cooker and shred with a fork.
Remove sauce from heat. Place shredded meat in the saucepan with the sauce and stir to coat.