In "Klonoa" for Wii, that boss that you fight on the bridge that's swinging back and forth. It's a cool concept for a fight that really utilizes Klonoa's 2D/3D style, and it comes right before one of the most dramatic moments of the story, so it's a shame that it's pathetically easy compared to the bosses before and after it. Definitely a case of bizarrely-low difficulty.