Star vs. the Forces of Evil Wiki
Register
Advertisement
This article is about the character. You may be looking for the episode.

You'll never get rid of me! I'm part of you now! You can treat the symptoms, but you'll never cure the virus!
―Monster Arm's last words[src]

Monster Arm is an accidental replacement right arm for Marco that Star created with her wand in the episode of the same name.

Personality[]

It has a mind of its own and desires to eat the bowels of humans. Once finding out about its intentions and its bad influence on him, Marco gets Star to fix it and return his arm to normal. Monster Arm, before it's completely gone, threatens that it isn't permanently removed and it will remain a part of Marco.

Before it revealed itself as sentient, the Monster Arm would spill Marco's food, slap him in the face, and mess with his shower water, apparently for no reason.

Appearance[]

Monster Arm is a large tentacle creature with a light magenta underside and light pink suction cups. Most of the arm is deep blue and fades to purple at the tip of the tentacle. Its teeth are dull yellow and sharp and it is covered in pink slime.

Abilities[]

It is strong enough to allow Marco to do 675 one-arm (one-tentacle) handstand push-ups with it.

Sightings[]

Season 1[]

Season 3[]

Gallery

Click here to view the image gallery for Monster Arm (character).
Click here to view the gallery.

Trivia[]

  • Monster Arm appears in the crowd surrounding Star and Marco in the season 1 opening theme song.
  • Monster Arm appears in "Storm the Castle" in a brief flashback Marco has when Star tells him to put his arm inside a strange creature.
  • Tom recalls Monster Arm in "Divide", despite him having no involvement with it.
  • During an AMA on Reddit on August 3, 2019, when asked about Monster Arm's return, Daron Nefcy answered, "we tried to write the Monster Arm return episode many times and we could never really get it to work!"[1]
  • Marco's voice actor Adam McArthur has said that Monster Arm won't return because Marco basically got rid of it with the confidence and skills he obtained in the Neverzone and in battle with Star.[2]

References[]

ved Star vs. the Forces of Evil Characters
Main characters
Star ButterflyMarco DiazLudo Avarius
Characters from Earth
Diaz family:
Angie DiazLinda DiazMariposa DiazRafael Diaz

Echo Creek Academy:
Alfonzo DolittleAndreaAwesome OpossumsBeckyBlake LemonsBrittney WongChantalChelsea McNelseyEdFerguson O'durgusonFrancis SmithingtonHope HadleyIngrid BloomgrenJackie Lynn ThomasJanna OrdoniaJustin ArmbergLars VanderdudLeahMegan GandlymMiss SkullnickMoobs SquitsonOskar GreasonPrincipal SkeevesRaya RouseySabrina BackintoshStarFan13TimmyZeke


Other:
Amy VendrosianBon BonBrigidCharlie BoothJeremy BirnbaumLove SentenceLydiaMackie HandMarisolMrs. LiaoSensei BrantleyWarriors

Characters from Mewni
Butterfly family:
Celena ButterflyComet ButterflyCrescenta ButterflyDirhhennia ButterflyEclipsa ButterflyEstrella ButterflyFestivia ButterflyJushtin ButterflyMeteora ButterflyMoon ButterflyRhina ButterflyRiver ButterflySkywynne ButterflySolaria Butterfly

BabyFooldukeGlossaryckLady WhositsLil ChaunceyLion dragonManfredMime GirlMina LoveberryRuberiotSir LavaboSir Scarsguard


Avarius family:
Dennis Avarius


Pony Head family:
King Pony HeadPony Head


Underworld:
BrianDave LucitorMr. CandleTom LucitorWrathmelior Lucitor


Forest of Unlikely Spider Bites:
King ShastacanPrincess Spiderbite


Ludo's army:
Bald eagleBeard DeerBearicornBig ChickenBoo FlyBuff FrogEmmittGiant spiderLobster ClawsMan ArmSpikeballsThree-eyed Potato BabyToffeeUnnamed bat monsterUnnamed crocodile monsterUnnamed flower monsterUnnamed frill-neck monsterUnnamed giraffe monsterUnnamed goat monsterUnnamed lizard monsterUnnamed mushroom monsterUnnamed two-headed monsterUnnamed warthog monster


Other:
BabsBuff Frog's tadpolesDogbullDr. Jelly GoodwellFlower monstersGlobgorHiggsHydraJohansen familyMewmansPie KingRich PigeonSeahorseSlime MonsterWarnicorns

Characters from other dimensions
Magic High Commission:
HekapooLekmetOmnitraxus PrimeReynaldo the Bald PateRhombulus

St. Olga's Reform School for Wayward Princesses:
GeminiGuardsPrincess ArmsPrincess SmooshyRasticoreSt. OlgaSt. Olga's princesses


Quest Buy:
Cobalt FerreroQuest Buy sloth clerksRiddle Sphinx


Pixtopia:
Pixie clerkPixie EmpressPixie taskmasterPixies


Other:
Ben FotinoBrunzettaDragon-cycleFather TimeHeliosHungry LarryJorbyKellyMillhorseNachosNaysayaPreston Change-OQuirky GuyRoySeanSquaresTadTalon RaventalonWilloughbyWooletts

Star Butterfly's creations
Butterfly monsterCloudyDoop-DoopGiant magical squirrelsLaser puppiesMonster ArmSpider With a Top HatThree-eyed firecats
Advertisement