Terror of the Black Knight

After being impressed by Irwin's realistic armor at the medieval fair, Billy wishes for a fancy armor too. Then, Grim gives him the "Cursed Suit of the Black Knight". However, when Billy needs to go to the bathroom, the curse is revealed to be that the armor can't be taken off until the person wearing it beats someone in a competition. Therefore, Billy desperately tries to defeat other people at various contests but fails to come out victorious. In the end, Billy defeats Mandy at a breakdance contest, in which Mandy decided not to participate, but he doesn't need to go to the bathroom anymore.

Billy, Mandy e Tenebra si travestono a tema per una fiera rinascimentale. Quando però si presenta Irwin con un magnifico costume, Billy è geloso perché il suo è scadente. Tenebra così gliene procura uno migliore, ma per toglierselo, Billy dovrà prima battere qualcuno in una qualsiasi competizione.