Sigma

Sigma is the main antagonist of Mega Man X franchise. He fought Ultron in the 101st episode of DEATH BATTLE.

Fanon Wiki Ideas

 * Metal Sonic vs Sigma

Possible Opponents

 * Buzz Lightyear (Toy Story)
 * Teridax (Bionicle)
 * Dr. Eggman (Sonic the Hedgehog)
 * Street Fighter
 * M. Bison
 * Seth
 * Dr. Wily (Mega Man)
 * Diaboromon (Digimon)
 * Megatron (Transformers)
 * DC Comics
 * Cyborg Superman
 * Brainiac
 * Lex Luthor
 * Murder Machine
 * Marvel
 * Apocalypse
 * Doctor Doom
 * Sephiroth (Final Fantasy)
 * Dracula (Castlevania)
 * Agent Smith (Matrix)
 * Star Wars
 * Darth Vader
 * General Grievous
 * Galacta Knight (Kirby)
 * Ganondorf (The Legend of Zelda)
 * Metroid
 * Ridley
 * Dark Samus