Stream anime episodes online for free, Watch 12 oz. Mouse Episode 20 – Prolegomenon English version online and free episodes. Anime Episode guide, Chapter 12 oz. Mouse Episode 20 – Prolegomenon Prolegomenon Fitz drops Skillet’s helmet and goggles on the ground and wanders into the burning diner, where he walks up to a red-glowing pinball machine and starts playing. The pinball machine’s bumpers are covered in cryptic red symbols. Soon, a pink cloud with orbiting musical notes descends from the sky outside and flashes brightly, causing the wrecked diner to return to pristine condition.