31 Characters created by Mark Gruenwald

Anaconda is a fictional supervillain appearing in American comic books published by Marvel Comics. She has generally been associated with the Serpent Society, often as foes of Captain America. Sitznski was given her superhuman abilities by the Roxxon corporation, giving her the codename Anaconda due to her powerful, adamantium-enhanced arms she uses to constrain or crush her opponents with. Her first appearance was as part of the Serpent Squad where they tried to retrieve the Serpent Crown only to be thwarted by Thing, Stingray and Triton. She later became a core member of Sidewinder's Serpent Squad and remained a member when they became the Serpent Society.

Armadillo is a fictional supervillain appearing in American comic books published by Marvel Comics.

The Asp is a former supervillain appearing in American comic books published by Marvel Comics. The character has been depicted as a member of the villainous Serpent Society as well as the group BAD Girls, Inc., a group of all female adventures.

Battlestar is a fictional superhero appearing in American comic books published by Marvel Comics. He became the fifth character to assume the alias Bucky before taking on the name "Battlestar".

Black Mamba is a fictional supervillain appearing in American comic books published by Marvel Comics. She first appeared in Marvel Two-in-One #64 created by writers Mark Gruenwald and Ralph Macchio. The character is most closely associated with the Serpent Society and BAD Girls, Inc. but has also been a member of the Masters of Evil, the Femizons and the Women Warriors.

Bombshell is a name used by fictional characters appearing in American comic books published by Marvel Comics.

Coachwhip is a fictional character, a supervillain appearing in American comic books published by Marvel Comics. She first appeared in Captain America #341, created by writer Mark Gruenwald and artist Kieron Dwyer. She has been depicted most notably as a member of the Serpent Society in its various incarnations.

Crossbones is a fictional supervillain appearing in American comic books published by Marvel Comics. The character is usually depicted as an adversary of Captain America, and played a part in his assassination.

The Death-Throws are a fictional team of supervillains appearing in American comic books published by Marvel Comics. They first appeared in Captain America #317 and were created by Mark Gruenwald and Paul Neary. Introduced as enemies of Hawkeye, the Death-Throws consists primarily of jugglers who each use various juggling props as weapons.

Diamondback is a fictional character appearing in American comic books published by Marvel Comics. Originally a super villain who was part of the Serpent Society, she was first introduced in Captain America #310 and became a series regular for years afterwards.

D.P. 7 was a comic book series published by Marvel Comics as part of its New Universe imprint. It ran for 32 issues and an Annual, which were published from 1986 to 1989.

The Flag-Smasher is the name used by two fictional supervillains appearing in American comic books published by Marvel Comics. The original was most often a foe of Captain America while other adversaries of the Flag-Smasher include Punisher, Moon Knight, Ghost Rider, Runaways, Liberteens and Deadpool.

Jack Flag is a fictional character appearing in American comic books published by Marvel Comics. A minor patriotic hero, he has occasionally appeared alongside Captain America and has been a member of the Guardians of the Galaxy.

The Grapplers is a fictional organization appearing in American comic books published by Marvel Comics. It is a loosely organized group of female wrestlers, most of whom gained superhuman strength through the group known as Power Broker, Inc. The group's first appearance was in Marvel Two-in-One #54, created by Mark Gruenwald, Ralph Macchio and John Byrne. The group's membership was later expanded in Thing #33 written by Mark Gruenwald.

Haywire is a fictional superhero appearing in American comic books published by Marvel Comics.

Korath the Pursuer is a fictional character appearing in American comic books published by Marvel Comics. Korath was a geneticist, who founded and led the Pursuer Project. He also was a member of the Starforce.

The Grapplers is a fictional organization appearing in American comic books published by Marvel Comics. It is a loosely organized group of female wrestlers, most of whom gained superhuman strength through the group known as Power Broker, Inc. The group's first appearance was in Marvel Two-in-One #54, created by Mark Gruenwald, Ralph Macchio and John Byrne. The group's membership was later expanded in Thing #33 written by Mark Gruenwald.

Madcap is a fictional supervillain appearing in American comic books published by Marvel Comics.

Maelstrom is a fictional character appearing in American comic books published by Marvel Comics.

The Needle is a fictional character, a mutant supervillain appearing in American comic books published by Marvel Comics. Created by Mark Gruenwald, Carmine Infantino, and Al Gordon, the character first appeared in Spider-Woman #9.

Perun is a fictional character appearing in American comic books published by Marvel Comics. The character is based on the mythical deity in Slavic mythology, with control over thunder and lightning similar to that of the Norse god Thor.

The Grapplers is a fictional organization appearing in American comic books published by Marvel Comics. It is a loosely organized group of female wrestlers, most of whom gained superhuman strength through the group known as Power Broker, Inc. The group's first appearance was in Marvel Two-in-One #54, created by Mark Gruenwald, Ralph Macchio and John Byrne. The group's membership was later expanded in Thing #33 written by Mark Gruenwald.

Red Guardian is the name of several fictional superheroes appearing in American comic books published by Marvel Comics. The Red Guardian is an identity that was created as the Soviet equivalent of Captain America, although its use has continued after the fall of the Soviet Union.

Redstone is the name of two fictional characters appearing in American comic books published by Marvel Comics.

Sidewinder is the name of three different fictional characters appearing in American comic books published by Marvel Comics. The original Sidewinder, Seth Voelker, first appeared in Marvel Two-in-One #64, created by writers Mark Gruenwald and Ralph Macchio. A second Sidewinder appeared in 1998 but was killed during his attempt to infiltrate S.H.I.E.L.D.. A third Sidewinder, Gregory Bryan, was given powers similar to the original Sidewinder by the Brand Corporation

Skein is a fictional character, a mutant supervillain appearing in American comic books published by Marvel Comics.

Slug is a fictional character, a supervillain appearing in American comic books published by Marvel Comics.

Songbird, formerly known as Screaming Mimi, is a fictional superhero appearing in American comic books published by Marvel Comics. Originally a supervillain, she possesses supersonic sound abilities that can cause a variety of effects.

Superia is a fictional character, a supervillain and criminal scientist appearing in American comic books published by Marvel Comics.

U.S. Agent is a fictional superhero appearing in American comic books published by Marvel Comics, usually those starring Captain America and the Avengers. He first appeared in Captain America #323 as Super-Patriot. He was later redesigned as a new incarnation of Captain America and, a few years later, as U.S. Agent.

Wundarr the Aquarian is a fictional character appearing in American comic books published by Marvel Comics. The character was created by Steve Gerber and Val Mayerik and first appeared in Adventure into Fear #17. A pastiche of Superman, Wundarr was created based on Gerber's "love of the Superman character and (...) desire to do a little parody/homage."