This is pretty short right now, but I'm sure it will get significantly longer. Anyway, this is off the top of my head.
To be eligible, at least one team member must possess a super power or a scientific device used regularly that simulates one:
Here's the list:
Alliance of Evil
Ani-men
Anti-Fly League (The Fly)
Anti-Justice League
Awesome Foursome
Axis Amerika
Band of the Bland
Battle Axis (Invaders)
Brotherhood of Dada
Brotherhood of Evil
Brotherhood of Evil Mutants
Cadre
Chessmen(Astro City)
Circus of Crime
Crime Champions
Crime Syndicate Of America
Death Throes
Death Squad (Iron Man)
Electro and his Emissaries of Evil
Evil Eight (Dial H For Hero)
Factor 3
Fatal Five
Forgotten Villains
Frightful Four
Fearsome Five
Gang (Supergirl)
Ginyu Force
Grapplers (MTIO)
Headmen
Helix (Infinity, Inc.)
Hellfire Club Inner Circle
HURRICANE (Inferior 5)
Factor 3
Injustice Gang of the World
Injustice Society
Intelligencia (Marvel)
Lawless League
League of Challenger-Haters (Challengers of the Unknown)
League of Evil Inhumans
League of Super-Assassins
Legion of Super-Rejects
League of Villains
Legion of Doom
Legion of Supervillains
Legion of the Weird
Lethal Legion
Madmen
Masters of Disaster
Meta Liberation Army
Monster Association
Monster Society Of Evil
Mutant Force (Captain America)
New Enforcers
Nuclear Family
Omega Flight
Paranormal Liberation Front
Pyramid(Astro City)
Recombatants
Renegades (Freedom Fighters)
Royal Flush Gang
Salem's 7 (Fantastic Four)
Serpent Squad/Society
Sinister Six
Sinister Society of Super Villains
Squadron Sinister
Super-Axis
Superman Revenge Squad (from the comics and animated series)
Tauros Gang
Team Carnivore(Astro City)
Team Rocket
Terrible Five
Terrible Trio (Batman)
Terrible Trio (Marvel)
U-Foes
Unholy Alliance(Astro City)
United Underworld (BATMAN the Movie)
Wrecking Crew
Zemo and his Masters of Evil
Zodiac
Tags:
Added the following:
Ani-men
Death Throes
Electro and his Emissaries of Evil
League of Evil Inhumans
Legion of the Weird
Lethal Legion
Squadron Sinister
Zemo and his Masters of Evil
I need the actual name of the group to add it.
From the Legion, there's
The League of Super-Assassins
The Legion of Super-Rejects
The Tauros Gang
From Justice League, there's
The Anti-Justice League
The Crime Champions
From Spider-Man,
The Sinister Syndicate
Plus:
The Renegades (Freedom Fighters)
Terrible Trio (Batman)
United Underground (BATMAN the Movie)
League of Challenger-Haters (Challengers of the Unknown)
Anti-Fly League (The Fly)
Superman Revenge Squad (from the comics and animated series)
The original X-Men fought Factor 3
X-Factor fought the Alliance of Evil
The New Mutants fought the Hellions.
Howard the Duck & the Defenders fought the Band of the Bland.
Added:
Alliance of Evil
Anti-Fly League (The Fly)
Anti-Justice League
Band of the Bland
Crime Champions
Factor 3
Hellions
League of Challenger-Haters (Challengers of the Unknown)
League of Super-Assassins
Legion of Super-Rejects
Renegades (Freedom Fighters
Superman Revenge Squad (from the comics and animated series)
Tauros Gang
Terrible Trio (Batman)
United Underground (BATMAN the Movie)