Ned and the Pumpkin Trio in the Graveyard.
The Pumpkin Trio are a trio of enemies near the big purple tree, in the Graveyard Nightmare. They are three possessed jack-o-lanterns mounted on stakes, that taunt Ned as he walks past them. The one in the middle vomits pumpkin guts onto Ned (unavoidable if Ned just walks past), the others are harmless. They cannot be defeated.