The mountain is composed of dark rock, that appear as if boulders were piled on top of eachother. At the base of the mountain there are hot springs, suggesting that there is magma under the mountain.
The Squirrel that hates Jake seems to live in a tree near the top of this mountain.
Normal-Sized Manticores also lurk on the mountain rocks and often complain about how they don't have any victims to prey on.
Carnivore Plants are snapping plants that can attack and feed on prey. They reside mainly on the bottom of the mountain.
Camouflage Rock Beasts
The Camouflage Rock Beasts are rock people that attack foreigners of the Wild Trap Mountain. They lurk and camouflage as a rock at the lower-parts of the mountain.
Mind Control Parasites
Mind Control Parasites are plants that shoot darts towards it victims to hypnotise them and control their minds. Finn gets shot by a dart in the episode "Normal Man." After he gets shot, he positions his sword towards his heart and tries to plunge in into his heart before Jake flicks the dart off him stopping the hypnotism.
Archer Bandits are bandits that lurk near the top of the mountain with bows and arrows. They are killed by Jake in "Normal Man" when he bounces the arrows off of his body into the bodies of the Archer Bandits.
That One Guy Nobody Messes With
Simply a dude who no one messes with.
The Dragon Ghost flies throughout the mountain and terrorises people. It doesn't seem to actually cause any harm.
The Group of Weekend Survivalists are a hiking group that survive in this mountain. They also get daymares from the Waking Dream Demons.
Red ants randomly crawl onto victims and bite them on this mountain,
Waking Dream Demons
The Waking Dream Demons sit on top of rocks on the mountain and terrorise people such as the weekend survivalists by giving them daymares.