Coat a slow cooker with cooking spray. Place bell pepper strips and pork chops into the slow cooker. Pour teriyaki sauce, vinegar, garlic, and red pepper flakes over the pork chops.
Cover and cook on Low until pork is very tender, 8 to 9 hours. Once tender, remove pork from the slow cooker, and whisk in peanut butter until smooth. Return pork to the slow cooker, and cook 10 minutes more.
Pour into a serving dish and sprinkle with green onions and peanuts to garnish. Decorate with lime wedges to serve.