Big Chill

Big Chill is the Omnitrix's DNA sample of a Necrofriggian from the planets Kylmyys and Mykdl'dy.

Appearance
Big Chill is a humanoid, moth-like alien whose wings and antenna can fold up into a hooded robe, giving him the appearance of a phantom.

Big Chill has a black body with blue and white spots on his arms and legs that resemble ice chunks, a light blue torso and large green eyes. He has three pointed fingers and a thumb on each hand and two toes on each foot and a third toe-like extension on his ankles. Big Chill wears the Omnitrix/Ultimatrix symbol on his chest.

In Omniverse, Big Chill has a much more muscular build and has large eyebrows and sharper ears, both similar to Ultimate Big Chill. He has a belt on his waist where the Omnitrix symbol is located. He has bigger wings, claws and a black beard design under his chin. 15-year old Big Chill in Omniverse looks exactly the same but he lacks the belt and the Omnitrix symbol is on his chest.

Powers and Abilities
Big Chill is capable of breathing a freezing vapor that reduces the temperature surrounding the vapor, encasing targets in ice. He can generate ice beams from his hands that he can manipulate. In Vilgax Attacks, Big Chill was capable of generating spiked balls of ice around his fists, as well as hurling ice spikes, as well as causing these spikes to sprout from the ground surrounding him. In Cosmic Destruction, it was revealed that he can attack with an, "icy uppercut," as well as manipulate the cold around him to make an frosty tornado.

Big Chill's body contains a density-altering protoplasm that allows intangibility.

Big Chill is completely immune to extreme subzero temperatures, however he is also able to resistant to extreme heats. It was revealed in Deep that Big Chill can survive underwater. Big Chill can also survive in the vacuum of space.

Weaknesses
Big Chill's intangibility is useless against opponents who can also turn intangible as their intangibility cancels out. The only known inanimate objects that have proven to physically contact intangible Big Chill are the Rust Bucket's netting, Vilgax's Glove, and the Techadon Robots' defense systems.

Big Chill's intangibility is consciously used, not reflexively, which means he can't use his intangibility if he is caught off guard.

Alien Force

 * Big Chill first appeared in Kevin's Big Score.
 * ​Big Chill chased Kevin in the Rustbucket.
 * Later, Big Chill destroyed Vulkanus's armor.
 * In Max Out,
 * Big Chill appeared.
 * In Plumbers' Helpers,
 * Big Chill saved a man from a fire.
 * In Alone Together,
 * Big Chill tried to help Reinrassic III cool down and defeated a Dravek.
 * In Good Copy, Bad Copy,
 * Big Chill chased Gwen and Kevin.
 * Negative Big Chill battled some Forever Knights.
 * In Save the Last Dance,
 * Big Chill was taken over by his reproduction instincts and had 14 Necrofriggian babies.
 * In Voided,
 * Big Chill defeated D'Void.
 * In Birds of a Feather,
 * Big Chill appeared.
 * In Vengeance of Vilgax: Part 2,
 * Big Chill battled Vilgax.
 * In Inferno,
 * Big Chill captured Moldywarp.
 * In Fool's Gold,
 * Big Chill battled primal Decka.
 * In Single-Handed,
 * Big Chill was in the Null Void.
 * In Trade-Off,
 * Big Chill and Gwen battled the Forever Knights.
 * In Above and Beyond,
 * Big Chill battled Alan.
 * In The Final Battle: Part 1,
 * Big Chill battled Kraab.
 * In Ben 10: Alien Swarm,
 * Big Chill battled the Nanochips.

Ultimate Alien

 * Big Chill returns to Ultimate Alien in Duped.
 * ​Big Chill was used by one of the Bens to battle Urian.
 * In Hit 'Em Where They Live,
 * Big Chill battled Vulkanus' soldiers before going Ultimate.
 * In Video Games,
 * Big Chill failed to defeat the Stalker.
 * In Escape From Aggregor,
 * Big Chill battled Galapagus before going Ultimate.
 * In Too Hot To Handle,
 * Big Chill battled P'andor.
 * In Ultimate Aggregor,
 * Big Chill goes Ultimate.
 * In Map of Infinity,
 * Big Chill battled some Albino Necrofriggians.
 * In Deep,
 * Big Chill chased Ultimate Aggregor before going Ultimate.
 * In Absolute Power: Part 2,
 * Big Chill battled Ultimate Kevin.
 * In Viktor: The Spoils,
 * Big Chill tried to keep Dr. Vicktor frozen and went Ultimate.
 * In It's Not Easy Being Gwen,
 * Big Chill battled Dr. Animo and his mutant frog.
 * In Prisoner Number 775 is Missing,
 * Big Chill searched through an alien prison in Area 51.
 * In Greetings From Techadon,
 * Big Chill failed to get into a Techadon ship.
 * In The Flame Keepers' Circle,
 * Big Chill tried to save Julie.
 * In The Mother of All Vreedles,
 * Big Chill battled Ma Vreedle.
 * In Heroes United,
 * Big Chill was used three times as the primary flight alien and fought Alpha.
 * In The Eggman Cometh,
 * Big Chill froze the mutated reptiles.
 * In Night of the Living Nightmare,
 * In a dream, Negative Big Chill battled Ben.

Omniverse

 * Big Chill returned to Omniverse in Of Predators And Prey: Part 2.
 * ​Big Chill saved Rook from Khyber's Ship.
 * In Malefactor,
 * Big Chill battled Hypnotick.
 * In Ben Again,
 * Big Chill was used to find coordinates.
 * In Special Delivery,
 * In a flashback, fifteen year old Big Chill froze a DNAlien and accidentally froze Mr. Baumann's car.
 * In Showdown: Part 1,
 * Ben turned into Big Chill to escape Terroranchula's web and he froze Zed but was hypnotized by Hypnotick three times.
 * In Tummy Trouble,
 * Big Chill battled some Incurseans.
 * In The Frogs Of War: Part 1,
 * Big Chill froze Milleous.

Ben 10: Alien Force (Video Game)
Big Chill is a playable alien character.

Ben 10 Alien Force: Vilgax Attacks
Big Chill is a playable alien character.

Ben 10 Ultimate Alien: Cosmic Destruction
Big Chill is a playable alien character. Big Chill can be used for flight. His ice breath can be used to extinguish fire and freeze an object and enemies. His Ultimate form, Ultimate Big Chill is used in a boss battle.

Ben 10: Galactic Racing
Big Chill is a playable racer in this game on all platforms.

Punch Time Explosion and XL
Big Chill is one of 16 year old Ben's playable aliens.

Appearances
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Ben 10: Alien Force

 * Kevin's Big Score (first appearance) (x2)
 * Max Out
 * Plumbers' Helpers
 * Alone Together
 * Good Copy, Bad Copy (x3)
 * Save the Last Dance (x3) (second time accidental transformation; selected alien was Jetray)
 * Voided
 * Birds of a Feather
 * Vengeance of Vilgax: Part 2
 * Inferno
 * Fool's Gold
 * Single-Handed
 * Ben 10: Alien Swarm (accidental transformation; selected alien was Spidermonkey)
 * Trade-Off (accidental transformation; selected alien was Humungousaur)
 * Above and Beyond
 * The Final Battle: Part 1

Ben 10: Ultimate Alien

 * Duped (first re-appearance, used by Echo Echo clone)
 * Hit 'Em Where They Live (goes ultimate)
 * Video Games
 * Escape From Aggregor (goes ultimate)
 * Too Hot To Handle
 * Ultimate Aggregor (goes ultimate)
 * Map of Infinity
 * Deep (goes ultimate)
 * Absolute Power: Part 2
 * Viktor: The Spoils (goes ultimate)
 * It's Not Easy Being Gwen
 * Prisoner #775 is Missing
 * Greetings From Techadon (goes ultimate)
 * The Flame Keepers' Circle (goes ultimate)
 * The Mother of All Vreedles
 * The Eggman Cometh
 * Night of the Living Nightmare (Used by Albedo) (Dream)

Ben 10: Omniverse

 * Predators and Prey: Part 2 (first re-appearance)
 * Malefactor
 * Ben Again
 * Special Delivery (used by 15 year old Ben in flashback)
 * Showdown: Part 1
 * Tummy Trouble (x2) (first time accidental transformation; selected alien was Jetray)
 * The Frogs Of War: Part 1

Specials

 * Ben 10-Generator Rex: Heroes United (x3)}}

Ben 10: Alien Force/Ben 10: Alien Swarm

 * 4" Big Chill (Alien Collection)
 * 4" Big Chill (Defender)
 * 6" Big Chill (DNA Alien)
 * 4" Big Chill (Cloaked)
 * 4" Ben 10: Alien Swarm set #2 - includes: Clocked Big Chill (transparent), Nanomech (Defender), Humungousaur (Clear green), and Big Chill (Defender)
 * Big Chill (Deluxe)
 * Alien Creation Goop and Big Chill
 * Big Chill Alien Creature
 * Big Chill Alien Rock

Ben 10 Omniverse

 * 4" Big Chill (coming soon)

Trivia

 * Big Chill's design resembles Mothman.
 * Big Chill's hologram alternates between his robed form and unrobed form.
 * When someone asked if Big Chill is female, Dwayne replied "Sort of".
 * Big Chill is a playable character in Cartoon Network's game TKO. His special moves are the Cold Rush and the Chill Out. His super move is the Ice Quake. His alternate color (when the players choose the same characters) is a darker blue/purple.
 * In the Cartoon Network game TKO, Big Chill is missing his wings, but Ultimate Big Chill has his.
 * Big Chill is the only alien in the opening of Ben 10: Alien Force with their alien hologram shown next to them.
 * Big Chill is the first alien to appear whose mouth does not move when he speaks.