Jake's shape-shifting ability plays a vital role in his and Finn's adventures. He can enlarge his body to transport multiple passengers, minimize to fit in Finn's pocket, and morph into different forms. He can also harden or sharpen parts of his body, which is beneficial in battles. On occasions, Jake has transformed into a muscular entity, acting as armor for Finn, enabling Finn to manipulate his actions. Jake's stretchy powers have been utilized to combat various adversaries, including the Lich and an army of Earclopses.