Toonba Knight

He appears randomly in odd places often, he is 2D so you can only see him from so many angles. He is a passive NPC and can only be fought if AFTER the corrupt tuba king is defeated, due to the fact that he was indeed corrupted by the Tuba King and was a spy for him. He is a secret boss, having to have collected every single piece of scrap paper from the entire adventure. If even 1 piece of paper is thrown away he will not appear.