People & Creatures Ploppa First named in The Yellow Knight of Oz, ch. 2 "Far--far--very far, but not too far for Ploppa," On this page Appears inSeen alongsideSeen in Appears in The Yellow Knight of Oz (3 of 20 chapters) 2 THE KNIGHT'S FIRST ADVENTURE3 QUEEN MARCIA OF MARSHLAND4 PLOPPA AND SIR HOKUS ESCAPE Seen alongside Sir Hokus 3 Seen in The Emerald City 1