Stag

The Stag was the main antagonist in "No One Can Hear You."

The stag rampaged through the Candy Kingdom, licking its residents as it went along. Finn and Jake soon arrived to stop it, however, they were beaten. Jake sustained a serious head injury, causing him to go temporarily insane. Finn's legs were broken, and Stag kicked him into a pole, sending Finn into a coma. The deer's saliva is orange, and it appears to have a strange adhesive property, which the stag used to capture the citizens of the Candy Kingdom, drag them into the sewers, and then stick them to the walls in a drainage room because it has a sweet tooth. Its two front hooves are actually gloves which conceal two human-like hands with opposable thumbs. It also has the ability to walk upright, which it uses while fighting Finn and Jake.

Finn and Jake eventually come to rescue the citizens where they confront it. The stag is knocked unconscious by two falling cinderblocks that were attached to Jake's feet, and then it is thrown into a whirlpool, possibly killing it.