When spike (fu-dao-long) spent a long time in the dragon kingdom and after long years of kung fu training with his grandfather he will become a kung fu master in kung fu school

What happened to the royal family, Princess Celestia and Luna are worried about him and Twilight has been crying about him and remorse over him from time to time. As for her brother Shining armor, he is very worried about his sister and will work hard to bring him to the royal family, especially after he was fired from his job as a result of his foolish behavior with him