Mad Scientist

• 
  All For One
• 
  Anthony "Tony" Stark(Iron Man) (Earth-12041)
• 
  Arnim Zola

• 
  Baron von Blitzschlag
• 
  Black Villain

• 
  Commander Charon
• 
  Cowboy Rick
• Category:Criminals
• 
  Cronenberg Rick
• 
  Cyrus

• 
  Danzo Shimura
• 
  Denzel Crocker
• 
  Dexter
• 
  Dr. Aloysius James Animo(Reboot)
• 
  Dr. Baxter Stockman
• 
  Dr. Baxter Stockman(2012)
• 
  Dr. Baxter Stockman(Same As It Never Was)
• 
  Dr. Calgary
• 
  Dr. Deacon Frost
• 
  Dr. Emile Dorian
• 
  Dr. Emmett Brown
• 
  Dr. Faker
• 
  Dr. Franken Stein
• 
  Dr. Fuji
• 
  Dr. Gero (Android 20)
• 
  Dr. Hugo Strange
• 
  Dr. Hugo Strange (Batman Anniversary Short)
• 
  Dr. Namba
• 
  Dr. Nuvo Vindi
• 
  Dr. Pamela Lillian Isley(Poison Ivy)
• 
  Dr. Poison
• 
  Dr. Psychobos
• 
  Dr.Ichigaki

• 
  Elmer Fudd
• 
  Evil Rick

• 
  Fukegao
• 
  Future Dr. Gero(Android 20)
• 
  Future Drakken
• 
  Future Jack Spicer

• 
  Hange Zoë

• 
  Igor Drenkov

• 
  Jack Spicer
• 
  Jason Wyngarde(Mastermind) (Earth-101001)
• 
  Joker
• 
  Jonathan Crane(Scarecrow)
• 
  Justin Hammer (Titanium Man)

• 
  Kabuto Yakushi

• 
  M.O.D.O.C. (Earth-904913)
• 
  M.O.D.O.C. (Earth-TRN123)
• 
  Madara Uchiha
• 
  Mandark
• 
  Mary Test
• 
  Maximus the Mad (Earth-TRN123)
• 
  Mayuri Kurotsuchi
• 
  Medusa Gorgon
• 
  Minoru Kamiya
• 
  Mojo Jojo

• 
  Nathaniel Essex(Mister Sinister)
• 
  Nikola Tesla
• 
  Norman Osborn (The Goblin) (Earth-TRN123)

• 
  Obito Uchiha
• 
  Orochimaru
• 
  Orochimaru(Tsunades Infinite Tsukuyomi)
• 
  Otto Octavius(Doctor Octopus) (Earth-26496)
• 
  Otto Octavius(Doctor Octopus) (Earth-TRN123)

• 
  Peter Lorre
• 
  Proctor Servantis
• 
  Professor Sebastian
• 
  Professor Zayton Honeycutt
• 
  Professor Zayton Honeycutt(Time Loop)

• 
  Raymond Warren(Jackal) (Earth-TRN633)
• 
  Red Skull(Cosmic Skull)
• 
  Rick Sanchez(Look Who's Purging Now)
• 
  Rick Sanchez(Raising Gazorpazorp)
• 
  Rick Sanchez(Rick Potion No. 9)
• 
  Rick Sanchez(The Ricks Must Be Crazy)

• 
  Sally(Black Clover)
• 
  Samuel Sterns (The Leader) (Earth-TRN123)
• 
  Sheldon J. Plankton
• 
  Shin Uchiha
• 
  Sosuke Aizen
• 
  Sublime (Earth-101001)
• 
  Susan Test
• 
  Szayelaporro Granz

• 
  Tanuki Shigaraki
• 
  The Brain
• 
  The Osborn Goblin
• 
  Toxic Rick

• 
  Ultra-Humanite(Earth-23)

• 
  V.V. Argost
• 
  Van Kleiss
• 
  Varrick
• 
  Victor von Doom
• 
  Victor von Doom (Earth-12041)
• 
  Victor von Doom (Earth-91119)
• 
  Victor von Doom (Earth-TRN365)

• 
  Yzma