You are going to Watch Penn Zero: Part-Time Hero Episode 21 online free episodes with HQ / high quality. Stream cartoons Penn Zero: Part-Time Hero Episode 21 Online Save the Worlds. Phil and Rippen tunnel into The Odyssey and damage the Multi Universe Transprojector, causing unbalance in the multiverse. Vortexes form in every world that Penn and his team have visited. Penn, Boone, and Sashi must travel to each world and close all of the vortexs before everything and everyone from all the worlds get sucked into nothingness.