Marco hi res
Biographical information
Gender Male
Eye color Black
Hair color Brown
Born 1985
Family Eva (mother)
Peter (father)
Nora Robbinette (stepmother),
Affiliation Animorphs
Behind the scenes
First appearance The Invasion
Last appearance The Beginning
Portrayer Boris Cabrera (TV series)
Rene Mujica (voice, PC game)
Tim Shoemaker (voice, PlayStation game)
"People don’t understand the word ruthless. They think it means ‘mean.’ It’s not about being mean. It’s about seeing the bright, clear line that leads from A to B. The line that goes from motive to means. Beginning to end. It’s about seeing that bright, clear line and not caring about anything but the beautiful fact that you can see the solution. Not caring about anything else but the perfection of it."

Marco is the resident comedian of the Animorphs. He is best friends with Jake.


Throughout the war, Marco always maintains a sense of humor because he believes you have to decide whether you think life is tragedy or comedy, and he chooses to look for the joke in life. Because of this, Marco is able to crack jokes and make sarcastic remarks in the midst of battle just as easily as when he is chilling in the barn with his best friend Jake and the others. Marco is also very clever, and is good at thinking strategically. He was also the one who came up with the name "Animorphs" in the first book.

Marco is forever the cautious one, and at the start of the series he was the most reluctant to fight in the war. A major reason was he felt his dad was still suffering over the loss of his mother Eva, and wouldn't be able to bear it if he lost his son as well. Marco stayed in the war in honor of Jake's brother, but the stress began to get to him. He soon confessed to Jake that he had decided to quit, but that changed when he made a tragic discovery - his mother had not drowned two years earlier, but instead was infested by the Yeerk Visser One. Her death had been faked so that the Visser could use her body as a host. Marco's desire to save his mother and reunite his family was more than enough to make him continue the fight.

Marco has been called the most ruthless member to the Animorphs, often looking at the big picture and willing to make sacrifices in order to secure a win. This is in contrast with Cassie, who always considers emotions and morals in the equation, even when it comes to her enemies. They sometimes get on each other's nerves because of this. However Cassie has gotten through to Marco on occasion, sensing that he sometimes uses his humor to mask the pain he feels over his family situation. Marco desperately wants to save his mother, and yet he knows that in order to win the war he may have to destroy her. Later in the series, when Marco's dad remarries he is affected so much that his morphing goes wrong, causing him to become weird hybrid creatures. He recovers after he comes to terms with this.

Late in the series Marco's father (an engineer) gets into some work involving Z-space which attracts the attention of the Yeerks. Despite knowing the risks of saving his father from becoming a Controller, Marco cannot bring himself to let it happen. He makes a difficult decision and rescues his dad, revealing everything about the Animorphs and the battle against the Yeerks, including his mother's existence. It is this action that sets the wheels in motion for the end of the war.

The Chee use their holographic abilities to fake Marco and his father's death. Soon after, the Animorphs are able to save Marco's mother from an execution, during which Marco kills Visser One. Marco's family is reunited. After the war, Marco goes on to become a rich celebrity, writing books, appearing on talk shows and doing commercials. When Jake hears about Ax's abduction by The One, he asks Marco to come on the rescue mission. Jake affectionately notes Marco "would have killed [him]" if he had left without him.

Relationships with the other Animorphs

  • Jake: Jake and Marco have been friends since their childhood.  Although their friendship is tested at times, they generally retain a strong bond. Towards the end of the series this begins to deteriorate, as Jake sinks into depression and Marco regains his family. After the war, Marco and Jake no longer seem to be close, though Marco is concerned for Jake and attempts to reach out to him. However, when Jake asks Marco to rescue Ax from The One, it appears that their old friendship has been restored.
  • Tobias: At the beginning of the series the two aren't close, as Marco seems annoyed by Tobias's presence in Jake's life and frequently insults or hassles him. Eventually a strong camaraderie between them develops.
  • Rachel: Rachel and Marco's relationship is characterized by their insults and banter that gradually turns more hostile as the war progresses. They generally side together on group votes, as both are more interested in pragmatism than ethics. Their similar personalities are beneficial in understanding how the other thinks, but also serves as the basis for their frequent fights. They dated in the alternate universe of Megamorphs #4.
  • Cassie: Cassie describes Marco as cute, but not her type. Although they are generally on good terms, Marco is often impatient with Cassie's moralism. They are frequently united by their love for Jake, and work together to keep him grounded when necessary.
  • Aximili-Esgarrouth-Isthill: At first Marco dislikes and distrusts Ax, but the two develop a close relationship. Ax's dry sense of humor becomes more obviously influenced by Marco as the series goes on. After Marco's cover is blown and he has to leave his regular life, he goes to live with Ax at his scoop, and the two bond over electronics and soap operas.


Book Morphs

Morph Book Acquired
Silverback Gorilla (Big Jim) The Invasion
Osprey The Visitor
Female Wolf The Encounter
Dolphin The Message
Lobster The Predator
Black Ant
Fly The Capture
Mouse The Andalite's Gift
Termite The Secret
Great Horned Owl
Striped Skunk ("Mama")
Irish Setter The Android
Wolf Spider
Spider Monkey (Unusable, Sario Rip morph) The Forgotten
Jaguar (Unusable, Sario Rip morph)
Parrot (Unusable, Sario Rip morph) The First Journey
Chameleon (Unusable, Sario Rip morph)
Llama The Reaction
Racehorse The Unknown
Parrot The Escape
Hammerhead Shark
Mole The Underground
Mosquito The Decision
Tyrannosaurus Rex (Unusable, Sario Rip morph) In the Time of Dinosaurs
Cobra Snake (Spawn) The Discovery
Flea The Threat
Rhinoceros The Solution
Anteater The Suspicion
Baby Seal The Extreme
Polar Bear (Nanook)
Giant Squid The Exposed
Chimpanzee The Experiment
Eel The Sickness
Grizzly Bear (Unusable, Sario Rip morph) Elfangor's Secret
Human] (Mr. Grant) The Reunion
Mountain Goat
Hork-Bajir The Prophecy
Squirrel The Proposal
Toy Poodle (Euclid)
Orca Whale (Swoosh) The Mutation
Cheetah The Weakness
Honeybee The Other
Hork-Bajir The Unexpected
Beaver The Resistance
German Shepard (Champ) The Diversion
Mallard The Absolute
Human (Madame Governor)
Dragonfly The Answer

He has a total 53 usable morphs. 

Television Show Morphs

Morph Episode Acquired
Rat My Name is Jake, Part 2
Skink The Underground
Human (Mall cop) (never used) On the Run
Butterfly The Message
Cockroach The Escape
Wolf The Alien
Llama The Reaction
Mouse My Name is Erek
Duck Changes, Part 1
German Shepherd
Lizard Changes, Part 3
Hawk (off-screen) The Front

Marco has a total of 15 morphs.

Books Narrated By Marco


  • He has the WAA username Cassie98, which he uses to annoy Jake in instant messaging by pretending to be Cassie, although he likely has another account for primary use.
  • Marco has utilized 52 different morphs (the most of all the Animorphs) in the series and it is implied he has obtained even more. This is ironic in that originally Marco was the least willing of the Animorphs to be drawn into the war and yet he has acquired the greatest number of morphs overall.
  • Cassie describes Marco as having "incredible eyelashes."
  • Marco is one of the characters whose battle morph is often forgotten for merchandising and illustration purposes; although he very rarely uses anything besides his gorilla morph in regular battle, he was illustrated morphing into a wolf on the cover of Megamorphs #1, and a cobra in Megamorphs #4, while the other characters were all shown morphing into their preferred battle morphs.
  • Marco is the second Animorph to have acquired the DNA and morphed into a human of the opposite sex; the first is Tobias, when he acquires in The Illusion and morphs into her in The Test. Marco acquires and morphs into a female governor in The Absolute.
  • The cover of The Predator is very different in international covers. On the U.S cover, Marco morphs a Silverback Gorilla. While on the U.K cover, he morphs a lobster.
  • Marco has the most morphs out of all the Animorphs.
  • From the Anibase: Want to know the real reason Marco got a haircut in The Android? One day, K.A.'s editor, Tonya Alicia Martin, called K.A. up and said, "We have this really cute Marco model, but he has short hair" -- much shorter than Marco's hair in the books. K.A. agreed to give Marco a trim and had fun having the other characters tease him throughout the book -- and Marco has had short hair ever since.
  • In the Animorphs TV series, he was usually portrayed morphing into a wolf (Cassie's usual battle morph), rather than a gorilla.
  • In 1999, four different transforming toys of Marco were made.
    • Two of Marco's Transformers that were sold in stores turned into a Gorilla and a Fire Beetle, respectively
    • The third transformer, a Tri-Rex, was a Tyrannosaurus Rex figure made up of three separate Jake, Cassie, and Marco figures.
    • In 1999 Taco Bell released a transforming toy where Marco turns into a hammerhead shark.
  • Marco frequently uses the word "insane."
  • Marco has a strained relationship with the other Animorphs.
  • He is the only Animorph to update his re-release profile.
  • Marco has the most book covers showing him morphing into an insect with 4 total (Books 10, 30, 40, 45).
  • Because of many of his interactions with Jake and Ax, large numbers of LGBT readers considered Marco to be same-gender attracted, but not overtly due to Scholastic censorship. In response to being asked about this speculation in a discussion about representation,Michael Grant wrote on Twitter that "Marco was bi[sexual]."


Book Gallery

TV Show Gallery

Toy and Game Gallery

Animorphs Jake | Rachel | Tobias | Cassie | Marco | Ax
Auxiliary Animorphs James | Collette | Timmy | Kelly | Craig | Erica | Julio | Liam | Tricia | Jessie | Judy | Ray | Pedro | Elena
New Animorphs Jeanne Gerard | Menderash-Postill-Fastill | Santorelli
Other Animorphs David | You