Combatants' Home Productions

Like with series, sometimes the companies deserve credit too, including the productions that most of the Death Battle comabatants are from (with the exceptions of Justin Bieber and Rebecca Black), and here they are in Death Battle Episode order:

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

Companies
Disney: Boba Fett, Rogue, Luke Skywalker, Thor, Spiderman, Captain America, Deadpool**

Nintendo: Samus Aran, Goomba, Koopa Troopa, Yoshi, Mario, Princess Zelda, Princess Peach, Link, Pikachu, Fox McCloud, Luigi, Venusaur, Blastoise, Charizard, Kirby**

Capcom: Akuma, Mike Haggar, Zangief, Felicia, Chun-Li, Dr. Albert W. Wily, Blanka, M. Bison, Strider Hiryu, Ryu

Warner Bros: Shang Tsung, Wonder Woman, Harry Potter, Raiden, Batman, Superman, Shao Kahn, Sektor, Scorpion, Deathstroke**

Nickelodeon: Leonardo*, Donatello, Michelangelo, Raphael, Toph Beifong**

Microsoft: Zitz, Riptor, Master Chief, Black Orchid, Fulgore

Productions I.G.: Taokaka

Sony: Kratos

Image: Spawn

Konami: Bomberman

Namco Bandai: Dig Dug, Isabella "Ivy" Valentine, Epyon

Shonen Jump: Vegeta, Goku, Majin Buu**

Sega: Shadow the Hedgehog, Sonic the Hedgehog, Dr. Ivo "Eggman" Robotnik, Metal Sonic, Tails the Fox

SNK: Mai Shiranui

Hasbro: Starscream, Rainbow Dash, Bucky O' Hare

id Software: Doomguy

Square Enix: Cloud Strife

Mattel: He-Man

Rankin-Bass: Lion-O

Temco: Ryu Hayabusa

20th Century Fox: Terminator

MGM: Robocop

Toho: Godzilla

Kadokawa Pictures: Gamera

Saban: Tigerzord

Trivia

 * Nintendo currently holds 3 Death battle records. For having the most victors (6), the most losers (8) and for having the largest number of combatants (15).
 * So far, no Nintendo-owned combatant has been able to win against a Sega-owned opponent respectfully, having lost twice in a row.
 * No Warner Bros-owned combatant was able to win against a Disney-owned opponent,  having lost four times in a row, until Batman vs. Captain America.