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JUGGERMONK
Earth-8101

Real Name: Cain Marko

Identity/Class: Alternate Earth (Earth-8101) primate mutate

Occupation: Superhero, former criminal

Group Membership: Ape-Vengers (Ape X/Roy Reyna, Gro-Rilla/Hank Pym, Hawkape/Clint Barton, Iron Mandrill/Tony Stark, Monkey-C, Ms. Marvel/Carol Danvers, Quicksilver/Pietro Maximoff, Sandmonk/William Baker, Scarlet Witch/Wanda Maximoff, Speedball/Robert Baldwin, Spider-Monkey/Peter Parker, Thorangutan/Thorangutan Odinson, Vision, Wasp/Janet Van Dyne, "Wonder Ape"/Simon Williams)

Affiliations: None;
    formerly "Captain America" (John Falsworth)

Enemies: None;
    formerly Ape-Vengers;
    presumably Baron Blood (John Falsworth)

Known Relatives: Charles Xavier (Professor X, stepbrother)

Aliases: None

Base of Operations: Ape-Vengers Tower, Monkhattan

First Appearance: Marvel Apes I#1/1 (November, 2008)

Powers/Abilities: The Juggermonk possesses vast superhuman strength and durability, granted by the mystical power of the Crimson Gem of Cyttorak. Once in motion, he is nearly unstoppable, able to smash through obstacles and withstand extreme physical punishment.

Height: Unrevealed (approximately 5'8")
Weight: Unrevealed (approximately 180 lbs.)
Eyes: Blue
Hair: Unrevealed

History:

(Marvel Apes I#1/1 - BTS) - Cain Marko gained his powers after discovering the Crimson Gem of Cyttorak, which transformed him into the Juggernaut. Embracing this newfound strength, he became a destructive force.

(Marvel Apes I#1/1 (fb) - BTS) - At some point, Juggermonk was rehabilitated by Captain America (secretly Baron Blood/John Falsworth) and inducted into the Ape-Vengers. This followed a tradition of "rehabilitation" that Captain America proudly upheld since inducting Hawkape and the Scarlet Witch into their ranks, with other villains such as Boomerangutan, Scorpion and Sandmonk eventually following the same path. Juggermonk, however was unaware Captain America was the Nazi vampire John Falsworth.

(Marvel Apes I#1/1) - After Ape X, Speedball, and Spider-Monkey defeated Doctor Ooktopus with help from Earth-616's Gibbon and Dr. Fiona Fitzhugh, the group returned to the Ape-Vengers Tower. Still bound in a massive web cocoon, Doc Ook was handed over to Gro-Rilla and Juggermonk. Juggermonk then escorted their captive into the tower's sub-levels to face trial.

    Several hours later Juggermonk joined the Ape-Vengers and other super-simians in the sub-levels of the Ape-Vengers Tower to attend the trial of super criminal Doctor Ooktopus. While Doc Ook was suspended mid-air within a beam of red energy, Captain America recounted Ook's long list of crimes before Juggermonk and others forcibly removed his mechanical tentacles to ensure he would never again threaten apekind. Injured and enraged, Ook swore vengeance, but Captain America deemed him beyond rehabilitation, demanding total loyalty. His words incited chaos, Juggermonk and the gathered apes violently beat Ook, leaving him broken and near death.

Comments: Created by Karl Kesel.

If you watch closely you can see Juggermonk, recognizable by his armor, is one of the primates removing Doc Ook's mechanical tentacles. Although unrevealed it's likely this version of the Juggernaut also faced the X-Simians/X-Apes at some point.

The Marvel Apes limited series (2008) was conceived as a playful companion to the earlier Marvel Zombies phenomenon. Following the unexpected commercial success of Zombies, Marvel looked to replicate the formula by reimagining its superheroes in another offbeat, high-concept alternate reality. Writer Karl Kesel, inspired by Silver Age whimsy and the classic "What If?" tradition, pitched a world where Marvel's heroes and villains were evolved primates rather than humans. The project was greenlit as a four-issue miniseries, launching with a tongue-in-cheek promotional campaign that leaned into its absurdity while still delivering a surprisingly dark, satirical storyline. The series spawned several tie-ins and one-shots, positioning the Ape-Verse as both a parody of and homage to Marvel's multiverse storytelling.

Earth-8101 is the main Marvel Apes reality, but there are three others as well:
  - Earth-81218, possible future of Earth-8101 set in the year 2099.
  - Earth-90543, monkey Speedball was send back to his world and branded a traitor by the Ape-Vengers. This was a bad dream of the Gibbon.
  - Earth-95019, diverged from Earth-8101 when zombies invaded their world. The Official Handbook of the Marvel Universe A-Z Update #5 indicates that the timelines designated Earth-95019 and Earth-21050 were seemingly erased when Earth-616's Gorilla Girl went back to the moment the portal was opened and destroyed it.

Profile by MarvellousLuke

CLARIFICATIONS:
Juggermonk has no known connections to


Images: (without ads)
Marvel Apes I#1, p17, pan2 (main image)
Marvel Apes I#1, p17, pan5 (carrying Doc Ook)
Marvel Apes I#1, p21, pan1 (entering Ook's trial)


Appearances:
Marvel Apes I#1/1 (November, 2008) - Karl Kesel (writer), Ramon Bachs (pencils, inks), Tom Brennan (editor)


First Posted: 12/23/2025
Last Updated: 12/23/2025

Any Additions/Corrections? please let me know.

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