The Marvelous Misadventures of Flapjack (2008)

S2E7 Off With His Hat

While searching for his missing hat on an island teeming with chimpanzees, Flapjack teams up with Captain K'nuckles. Their adventure leads them to a researcher who has made the island her home. With her guidance, they set out to find the "secret meeting place," which turns out to be an active volcano. K'nuckles must navigate across the crater to retrieve his beloved hat.