Combatants' Home Series

Most of the Death Battle combatants are taken from their own home series to be pitted against other combatants (The only exceptions however who are not listed are Justin Bieber, Rebecca Black and Chuck Norris because they are real life people), They are listed by the following series in Death Battle episode order.

Note: Bold characters are victors, Italic characters means they've fought more than once, characters with '*' symbols next to their name have won more than once and characters two '*' symbols means they have undecided fates (their battle has not been released yet).

Combatants by Series
Star Wars: Boba Fett, Luke Skywalker, Darth Vader

Metroid: Samus Aran*

Street Fighter: Akuma, Zangief, Chun-Li, Blanka, M. Bison, Ryu, Dan Hibiki

Mortal Kombat: Shang Tsung, Raiden (Mortal Kombat), Shao Kahn, Sektor, Scorpion

Marvel Comics: Rogue, Thor, Spider-Man, Captain America, Deadpool, Iron Man, Beast , Doctor Doom, Wolverine, Hawkeye, Quicksilver

DC Comics: Wonder Woman, Batman, Superman*, Deathstroke, Lex Luthor, Green Arrow, The Flash, The Joker

Super Mario: Goomba, Koopa Troopa, Yoshi, Mario, Princess Peach, Luigi, Donkey Kong, Bowser

Final Fight: Mike Haggar

Teenage Mutant Ninja Turtles: Leonardo*, Donatello, Michelangelo, Raphael

BattleToads: Zitz

Killer Instinct: Riptor, Black Orchid, Fulgore

Darkstalkers: Felicia

BlazBlue: Taokaka, Ragna the Bloodedge

God of War: Kratos

Image Comics: Spawn

Bomberman: Bomberman

Dig Dug: Dig Dug

Dragon Ball Z: Vegeta, Goku, Majin Buu, Hercule Satan

Sonic the Hedgehog: Shadow the Hedgehog, Sonic the Hedgehog, Dr. Eggman, Metal Sonic, Tails the Fox, Knuckles the Echidna

Harry Potter: Harry Potter

King of Fighters: Mai Shiranui

Transformers: Starscream

My Little Pony: Rainbow Dash

Halo: Master Chief

Doom: Doomguy

Megaman: Dr. Wily, Mega Man

The Legend of Zelda: Princess Zelda, Link, Ganondorf

Final Fantasy: Cloud Strife, Tifa Lockhart

Pokémon: Pikachu, Venusaur, Blastoise, Charizard, Red, Mewtwo

He-Man and the Masters of the Universe: He-Man

ThunderCats: Lion-O

Ninja Gaiden/Dead or Alive: Ryu Hayabusa

Strider: Strider Hiryu

Soulcalibur: Ivy Valentine, Nightmare

StarFox: Fox McCloud

Bucky O' Hare and the Toad Wars: Bucky O' Hare

The Terminator: Terminator

RoboCop: RoboCop

Godzilla: Godzilla

Gamera: Gamera

Gundam: Gundam Epyon

Mighty Morphin' Power Rangers: Tigerzord

Kirby: Kirby

Guilty Gear: Sol Badguy

Naruto: Gaara

Avatar: The Last Airbender/Legend of Korra: Toph Beifong

Berserk: Guts

Gargoyles: Goliath

Metal Gear: Solid Snake, Raiden 

Tom Clancy's Splinter Cell: Sam Fisher

RWBY: Yang Xiao Long

Astro Boy: Astro Boy

Digimon: Agumon, Tai

Devil May Cry: Dante

Bayonetta: Bayonetta

Ratchet & Clank: Ratchet & Clank

Jak & Daxter: Jak & Daxter

Twisted Metal: Sweet Tooth

Red vs. Blue: The Meta**, Agent Carolina**

Trivia

 * When it comes to the series with the most number of Death Battle victors, it is currently known to be Marvel Comics with Rogue, Thor, Spider-Man, Deadpool, Iron Man, Doctor Doom, and Hawkeye.
 * Street Fighter, Super Mario, and Sonic the Hedgehog hold the record in a 3 way tie for the second most Death Battle Champions from a series with 3 each (Akuma, Zangief, and Blanka for Street Fighter; Yoshi, Princess Peach, and Donkey Kong for Super Mario; Sonic the Hedgehog, Metal Sonic, and Miles 'Tails' Prower for Sonic the Hedgehog.
 * When it comes to the series with the most number of Death Battle losers, it is currently known to be DC Comics with Wonder Woman, Batman (if you count his loss against Spider-Man), Deathstroke, Lex Luthor, and Green Arrow for DC Comics).
 * Super Mario holds the record for the second most number of Death Battle losers from the series with 5 losers made of Goomba, Koopa Troopa, the Mario Bros, and Bowser.
 * When it comes to the series with the highest number of combatants (winners and losers combined), that goes to Marvel Comics with Rogue, Thor, Spider-Man, Captain America, Deadpool, Iron Man, Beast, Doctor Doom, Wolverine, Hawkeye, and Quicksilver.
 * The Super Mario Series holds the record for second highest number of combatants in the series with eight combatants with oomba, Koopa Troopa, Yoshi, Mario, Princess Peach, Luigi, Donkey Kong, and Bowser.
 * Marvel was undefeated until Batman VS Captain America, but starts again with Deadpool VS Deathstroke.
 * The Mario series has played host to the most battles (Goomba VS Koopa, Yoshi VS Riptor, Mario VS Sonic, Zelda VS Peach, Luigi VS Tails, Donkey Kong VS Knuckles, and Bowser vs Ganon).
 * Until Beast VS Goliath after Iron Man VS Lex Luthor, Marvel's combatants had yet to face a single combatant outside of Warner Bros.
 * Raiden wasn't from DC comics, but he was from Warner Bros just as DC was.
 * So far, 22 of the combatants' home series does not have a winner yet (Final Fight, Battletoads, Darkstalkers, God of War, Bomberman, Harry Potter, Transformers, Doom, Mega Man, Final Fantasy, ThunderCats, Ninja Gaiden, Soulcalibur, Bucky O' Hare and the Toad Wars, The Terminator, Gamera, Mighty Morphin' Power Rangers, Naruto, Tom Clancy's Splinter Cell, Bayonetta, Jak & Daxter and Twisted Metal)
 * Of the 22, Mega Man, Final Fantasy, and Soulcalibur are the only series to have more than one battle regarding the series.
 * Mega Man has the most casualties with no winners yet (Wily, Bass, several Robot Masters and enemies, Mega Man); runner up is a tie between Final Fantasy, Soulcalibur, Jak & Daxter, with two each.
 * Super Mario, Mortal Kombat, and DC also have two losers (Super Mario is in one battle) until Yoshi VS Riptor, Shao Kahn VS M. Bison, and Goku VS Superman.