Dead Goblin

Dead Goblin made a brief appearance in the episode "The Eyes". The presence of this goblin creates a "goblin problem" for Peppermint Butler, who states: "I swear I found him like this, I don't know what happened."

Appearance
The outward appearance of Dead Goblin strongly indicates that he is indeed dead. His skin is a pale grey color, which is very different from the varying shades of green that most goblins display. He seems to be in a state of emaciation, as his rib cage is highly visible, which is also dissimilar from most healthy goblins. His ears and nose are broken and wrinkled.

He is also on the tall end of the scale, even when the varying heights of most goblins are taken into account. His head is roughly the size of Peppermint Butler's entire body, and his body is longer than Finn's body and head put together. (Though he his closer to the viewer than Finn, Jake, and Peppermint Butler, they seem to only be only a foot or so farther from the viewer than Dead Goblin, so his perceived size is not likely due to his proximity to the viewer.)

Circumstances of Death
Dead Goblin is shown laying in a shallow puddle of water, evidently spilled by a nearby overturned wooden bucket.

The residence that Dead Goblin is seen in front of is in an advanced state of delapatation. (The windows are broken, the molding of the door frame is peeled off to some degree, and a large chunk seems to be missing from one of its walls, among other idications of decay.)

Both the architectural style of the house and the pink trees in the background could indicate that his death and discovery took place inside the Candy Kingdom.

The goblins rib cage is also visible, indicating it could of died form lack of food or dehydration.

In the episode "Death in Bloom" it is revealed that Peppermint Butler has some association with the Land of the Dead. Also, in Mortal Recoil, Peppermint Butler is able to identify that the Lich was possessing Princess Bubblegum. This evidence may hint to the possibility that Peppermint Butler was actually responsible for the death of this goblin.

Circumstances of Discovery
During a flashback montage, Jake reminds Finn of their time spent supposedly disposing of Dead Goblin's corpse at the request of Peppermint Butler.

The exact exchange that the viewer is shown is as follows:

Jake (As a voiceover, after the event takes place.): "We...helped Peppermint Butler with his goblin problem..."

Peppermint Butler (As he leads Finn and Jake to Dead Goblin): "I swear I found him like this, I don't know what happened"

Finn: "We'll take care of it, Peppermint Butler."