Watch The Grim Adventures of Billy and Mandy Season 4 Episode 15 Online with Multi Subtitles - OnionPlay

Watch Watch The Grim Adventures of Billy and Mandy Season 4 Episode 15 Online with Multi Subtitles - OnionPlay on OnionPlay - After Grim has a beautiful dream, a nightmare escapes from the back of his head in the form of a supernatural, invisible duck that makes flatulence noises. The duck follows Grim everywhere, causing him embarrassment with its nonexistent flatulence and eventually leading to his arrest. The duck repeats the strategy, following other citizens, including Irwin's father and Billy, resulting in everyone's arrest. The duck tries to annoy Mandy, but she remains unperturbed in the face of its presence. The duck disappears, and Principal Goodvibes is very angry and gives Mandy 75 days of detention.