Answer:
Stanley Yelnats III, Stanley Yelnats IV, Zero, X-Ray, Squid, Magnet, Armpit, Zigzag, Warden, Kate Barlow, Sam, Charles Walker, Elya Yelnats, Madame Zeroni, Stanley Yelnats I, Stanley Yelnats II, Mrs. Yelnats, Mr. Sir, Mr. Pendanski, Ms. Morengo, Clyde Livingston, Barf Bag, Twitch and Clyde Livingston's wife.