Spike finds himself unable to help the Mane 6 clean up the old Castle of the Royal Pony Sisters, so he goes off to read a comic book, unaware that it possesses magical powers. When he reaches the end and reads the cryptic text on the last page, he is sucked into the comic book, with the Mane 6 also drawn in as they try to help free him. In the comic, they find themselves having taken the personas of the super-hero team, the Power Ponies, while Spike is their bumbling sidekick Humdrum. They realize they must defeat the super-villain Mane-iac (Ellen Kennedy) to escape the comic, but their clumsiness with their newfound powers leave all but Spike trapped. As Mane-iac prepares to threaten Maretropolis with her doomsday weapon, the Mane 6 asserts that Spike always comes through for them. Spike is able to use the distraction to trap Mane-iac's lackeys and free the others, allowing them to stop Mane-iac and safely return to Equestria.