Thon

The tiny, far-distant planet which is the site of the Interplanetary Olympic Games in September 1956. Summoned to Thon to compete against other “super-Olympic contestants,” Superman thwarts a scheme by two evil aliens to win the Olympics, along with the “giant power crystal,” a glowing, “limitless source of energy” to be awarded to the victor’s home planet, by entering a “powerful, remote-controlled robot” named Bronno in place of a legitimate contestant (Act No. 220: “The Interplanetary Olympics”). (See: Interplanetary Olympics)