Marceline's phone is first seen in "Go With Me" when Jake requests her help in getting Princess Bubblegum to go to Couples Only Movie Night with Finn.


Marceline's phone appears as a small crawling bug-like octopus at first. When Marceline grasps it in her hand, it takes on a fish-like appearance and grows to the size of an average house phone. It is blue in both its condensed and full-sized forms.


  • When Marceline's phone is in its condensed form, it closely resembles the green octopus Nut Creature.
  • When enlarged, the phone resembles a lamprey, an eel-like vertebrate known for its jawless mouth and blood-sucking ability.


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