The Marvelous Misadventures of Flapjack (2008)

S1E34 Gone Wishin'

Captain K'nuckles takes the heart of a mermaid queen, which is packed with candy-like wishes, hoping to journey to Candied Island with Flapjack. However, as they squander their wishes on frivolous desires, they uncover a shocking truth about the mermaid that changes everything.