Real Name: Marvin Flumm
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Mentallo can read minds as well as remotely connect to another person's mind and experience what they see and feel. He can also affect peoples' minds over rudimentary emotions like fear and project his thoughts into the minds of others.
Although his telepathic ability emerged during adolescence, Marvin Flumm grew up content to be a shoe salesman. He was recruited by S.H.I.E.L.D.'s E.S.P. division, led by Niles Nordstrom. After learning the use of his ability, Flumm hatched a plan to gain control of S.H.I.E.L.D., but was forced to flee when he was discovered. He did manage to steal special equipment to augment his abilities, and he used these to create his identity of Mentallo.
Flumm later allied himself with fellow criminal Norbert Ebersol, a.k.a. Fixer II, and they nearly succeeded in raiding S.H.I.E.L.D.’s New York headquarters before being forced to escape. The two began to work for the terrorist organization Hydra. One of their most involved missions for Hydra involved the pair tapping into S.H.I.E.L.D. computer systems, but this plot was prompted by Hydra's usurper, Baron Karza, archenemy of the Microns. The Microns battled Mentallo and the Fixer, and the Micron's Commander forced Mentello's helmet off, bombarding him with telepathic information that overloaded his mind and rendered him comatose.
S.H.I.E.L.D. took custody of Mentallo, but Professor Power arranged for Mentallo's body to be placed in his care. Power hoped to use Professor X's telepathic power to revive Mentallo and, in turn, force Mentallo to use his power to restore Power's son's mind, which was in a severe state of shock. Linked by a process created by the Fixer, Mentallo psychically battled Professor X on the astral plane, but Professor X proved too worthy an opponent and Mentallo's condition was unchanged.
Somehow recovering, Flumm appeared among the mutants calling themselves the Resistants, publicly opposing the proposed Mutant Registration Act, an act of Congress that was proposed in order to force mutants to register their abilities with the federal government. Their public protests were opposed by Captain America (John Walker, the U.S.Agent) his partner Battlestar, and Freedom Force. Several of the Resistants were badly injured, and the team was remanded to custody.
Later, Mentallo tried to resume his partnership with the Fixer. Unfortunately, the being he contacted was not the Fixer at all, but the Super-Adaptoid who was posing as the Fixer to escape the Avengers. After attempting to read his former partner's mind, Mentallo's own mind shut down, rendering him insensible. On the trail of the Fixer, the Avengers discovered Mentallo and remanded him to custody once more.
With his body being held in a stasis field in Seagate Federal Penitentiary, the authorities believed Mentallo's threat to be over. In fact, his mind was still actively involved in criminal activities. In this manner he discovered clues regarding a weapon of great power left behind by the death of the criminal industrialist Justin Hammer. The weapon had come to the attention of Mentallo by Hammer himself before he died, as Hammer awakened Mentallo's powers while he was in the stasis field.
Mentallo psychically sought out Hawkeye, who was also a prisoner there at the time. He secretly aided Hawkeye in surviving an attack by his more villainous inmates, finally convincing him to aid him in escape. Mentallo then organized for Hawkeye and three others (one of which was a Mentallo-possessed Headlok) to join a rotation of transferring prisoners. The rotation occurred during an attack by Graviton on the Earth, and his attempts to reshape the world allowed the prisoners to escape. Hawkeye, remotely "chained" to his inmates, escaped with the so-called Chain Gang.
Hawkeye's Chain Gang reluctantly agreed to work together to search for a way to survive, deactivate their security manacles, and to find Hammer's weapon. Unknown to his associates, Hawkeye was actually working undercover on behalf of S.H.I.E.L.D., and they were using Hawkeye as a mole to track Mentallo's criminal activities. The Chain Gang's escape briefly made S.H.I.E.L.D. lose track of them, and S.H.I.E.L.D. hired Songbird to track Hawkeye and his allies. When Songbird finally caught up with the Chain Gang, she helped Hawkeye defeat the villains.
However, Mentallo was later seen forced by Lucia von Bardas to band together with other villains who previously used technology that she helped provide for their equipment. The villains began a massive attack against S.H.I.E.L.D. and dozens of New York's heroes, but the battle turned out to be part of von Bardas' ploy to assemble the heroes in one place. She triggered a device common to all the villains in the technology they used, and she and the villains were linked together in a giant bomb over the city. S.H.I.E.L.D. agent Daisy Johnson was able to kill von Bardas, defusing the bomb, and the villains were remanded to custody.
First Appearance: Strange Tales (1951) #141
Think-Tank (Marvel)(01 - Marvin Flumm)
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View a chronological listing of this character's appearances
All-New Official Handbook of the Marvel Universe A to Z (2006)
Amazing Spider-Man: Family Business (2014)
Astonishing X-Men (2004)
#36 Avengers Academy (2010)
- 'Monstrous, Part 1'#37
- 'Monstrous, Part 2'#39
- 'Monstrous, Part 3'#41
- 'Monstrous, Conclusion'
Avengers Standoff: Assault on Pleasant Hill Alpha (2016)
Avengers Standoff: Assault on Pleasant Hill Omega (2016)
Avengers Unplugged (1995)
#4 Avengers: Deathtrap, The Vault (1991)
- 'The Old Ball and Chain'
Bullseye: Perfect Game (2011)
Captain America (1968)
#238 Captain America (1998)
- 'Snowfall Fury!'#412
- 'Disguise the Limit'#414
- 'Escape From A.I.M. Isle'
HC vol. 02 Captain America: Sam Wilson (2015)
- 'Captain America: American Nightmare'
Colección Extra SuperHéroes (2011)
#54 Daredevil (1964)
- 'Thunderbolts 04: Tendencias Heroícas'
#123 Der Unglaubliche Hulk Comic-Taschenbuch (1980)
- 'Holocaust In The Halls Of H.Y.D.R.A.!'
#38 Fantastic Four (1961)
- 'Die Rückkehr der Verteidiger'
#558 Free Comic Book Day 2007 (Spider-Man) (2007)
- 'The New Defenders'
Hämähäkkimies / Spider-Man (1980)
Heroic Age: X-Men (2011)
Iron Man/Captain America '98 (1998)
Jessica Jones: Avenger (2016)
TPB Marvel Encyclopedia (2014)
- 'Jessica Jones: Avenger'
Marvel Spotlight (1971)
Marvel Team-Up (1972)
#118 Marvel Two-In-One (1974)
- 'Meeting of the Minds'
#26 Micronauts (1979)
- 'The Fixer and Mentallo Are Back and the World Will Never Be The Same!'#27
- 'Day of the Demolisher!'
#24 New Avengers (2005)
Nick Fury, Agent of SHIELD (1968)
#18 Occupy Avengers (2017)
- 'Who Strikes At - - - SHIELD?'
Official Handbook of the Marvel Universe A to Z (2008)
Peter Parker: The Spectacular Spider-Man (2017)
Secret Avengers (2013)
#2 Secret Invasion (2008)
- 'Mission 002: Bagalia'#3
- 'Mission 003: Arlington'#4
- 'Mission 004: Tehran'#8
- 'Mission 008: The Cathedral'#12
- 'Mission 012: How to MA.I.M. a Mockingbird, pt. 1'#13
- 'Mission 013: How to MA.I.M. a Mockingbird, pt. 2'#14
- 'Mission 014: How to MA.I.M. a Mockingbird, pt. 3'#15
- 'Mission 015: How to MA.I.M. a Mockingbird, pt. 4'#16
- 'Mission 016: How to MA.I.M. a Mockingbird, pt. 5'
Secret War (2004)
#3 Spider-Woman: Origin (2006)
- 'Book Three of Five'#4
- 'Book Four of Five'#5
- 'Book Five of Five'
#2 Star-Lord (2017)
- 'Book Two'#5
- 'Book Five'
#5 Strange Tales (1951)
- 'Earth-Lord Part Five: The Heist'
Super-Villain Team-Up/MODOK's 11 (2007)
#1 The Avengers (1963)
- 'Mistaken for Happiness, or: "The Team"'#2
- 'Prevenge, or: "The Plan"'
#287 The Incredible Hulk (1968)
- 'The World According To The Adaptoid!'
Annual 18 The Invincible Iron Man DVD-ROM (2007)
- 'The Return of the Defenders Part 1'#403
- 'In Memory Yet Green'#404
- 'Disarray Thataway'
The Marvel Encyclopedia (2006)
HC The New Avengers: Most Wanted Files (2006)
- 'The Marvel Encyclopedia'
The Official Handbook of the Marvel Universe (1983)
#7 The Official Handbook of the Marvel Universe Deluxe Edition (1985)
- 'M: From Mandarin to Mystique'
#6 The Official Handbook of the Marvel Universe: Master Edition (1990)
- 'Human Torch to Ka-Zar'#8
- 'Magus to Mole Man'
#26 Thunderbolts: Life Sentences (2001)
- 'The Parent Trap'#54
- 'Cat & Mouse'#57
- 'Storm Clouds Gathering'#58
- 'Degrees of Evil'#60
- 'Brave New World?'#61
- 'Living in a Vise'#63
- 'Criminal Intent'
Weapon X (2017)
#22 Web of Spider-Man (1985)
- 'Weapon X-Force Part One'#23
- 'Weapon X-Force Part Two'#24
- 'Weapon X-Force Part Three'#25
- 'Weapon X-Force Part Four'#26
- 'Weapon X-Force Part Five'
X-Men: The 198 Files (2006)
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