He looks like SpongeBob SquarePants, except SpongeBob the elf wears a pointy striped green and orange hat, green pants, and an orange shirt.
He first appears in the window when the Snowwoman introduces the After Party. He then appears when the scene moves into show the Party. He then appears in the scene where the elf that looks like Carl Wheezer break dances. He then appears saying that he does not want to be an elf, but instead he wants to be a fry cook. He then appears in an embarrassing photo that shows him with his pants ripped. He then appears holding hands with Santa and the Winter Squidlock around the tree. He then opens presents with the other elves. He stops opening presents to say, "Happy..." [Insert Holiday Here] "...to you!"
"The 12 Days of Nickmas"
He first appears in the wide shot of the group. He then sings, "12 bubbles blowing," and blows bubbles in the winter Winter Squidlock's face. He then appears when the four elves on roller skates roll by. He then appears in the wide shot when the group sings, "And a starfish on a pine tree."