When you defeat all of the challengers, a RubberRobo will come up and take the prize. You will have to defeat four of them to get your prize back. When you open it, a Arcbeetle medabot will be yours for keeps. ( I tell you when you use Promeinence, it will shoot out a entergetic blast of blue light in the Medabots TV show, but it only has two bullets you have to fire at your opponent!)