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Caliburst,

Nebulon. Transforms into the weapon of Slugslinger.

Camshaft,

Autobot. Transforms into a car. He is one of the Omnibots.

Canon Masters/Turbomasters,

Group of Autobots. All have canon that are able to shoot rockets. In some countries they are called Canon Masters in other countries Turbomasters. I only know the names of the robots that are in my collection, it is possible that the names of the individual robots also is different and not only the group name (See info). The Canon Masters are:
Blizzard
Flash (This is his Turbomaster name)
Tempest
??????
Canon Master Medium:
Rotorstorm
Canon Master Large:
Eagle.

Cannon Transport,

Decepticon Micromaster Combiner Transport. This transport transforms into a base. The base is operated by Terror-Head and Cement-Head. This is one of the Micromaster Combiner Transports.

Carly,

Girlfriend of Spike in the old series. In the new series they are married and have a son: Daniel.

Carnivac,

Decepticon. Transforms into a wolf. He is one of the Pretender Beasts.

Cassettes,

See Mini-Cassettes for the Autobot Cassettes, or Spy-Cassettes for the Decepticon Cassettes

Catilla,

Autobot. Transforms into a tiger. He is one of the Pretender Beasts.

Cement-Head,

Decepticon Micromaster. Transforms together with Terror-Tread into a construction vehicle. Together they operate the Cannon Transport.

Cerebros,

Autobot. Transforms into a laboratory. He is one of the few pacifistic Transformers. In The Rebirth, part 3 he became a Headmaster. Spike transforms into his head and Cerebros himself transforms into the head of Fortress Maximus.

Chainclaw,

Autobot. Transforms into a bear. He is one of the Pretender Beasts.

Charger,

Decepticon Actionmaster. Firebeast transforms into Chargers battle armour.

Chase,

Autobot. Transforms into a car. He is one of the Throttlebots.

Chase,

See Chip Chase.

Cheetor,

Maximal. Comes from the Beast Wars. Transforms into a cheetah.

Cheetor,

Maximal. Comes from the Beast Wars. He is a Transmetal Figure, transforms into a cheetor or jets can flip out of his sides

Chip Chase,

He is a friend of Spike and the Autobots.

Chop Chop,

Decepticon. Transforms into a beetle. He is one of the Deluxe Insecticons.

Chromedome,

Autobot. Transforms into a car. In The Rebirth his head was modified into an exosuit for Stylor. Due to this proces, he became a Headmaster.

Chromia,

Female Autobot. One of the Autobot rebels on Cybertron in the time before The Movie. She is the girlfriend of Ironhide.

Cindersaur,

Decepticon. Transforms into a dragon. He is one of the Firecons.

Circuit,

Autobot Actionmaster. His car can transform into his exosuit. (Just like Thundercracker).

Claw Jaw,

Predacon. Comes from the Beast Wars. Transforms into a crab.

Cliffjumper,

Autobot. Transforms into a car. He is one of the Mini-Vehicles.

Cloudburst,

Autobot. Transforms into a plane. He is one of the Pretenders.

Cloudraker,

Autobot. Transforms into a plane. He is one of the two Autobot Clones.

Colossus,

Decepticon from the second generation. Transforms into the front end of a car. The rear end of the car transforms into a missile launcher. He is one of the Obliterators.

Combaticons,

Group of five Decepticons. They were all released for a second time in the second generation. Together they transform into Bruticus. Their names are:
Blast Off
Brawl
Onslaught
Swindle
Vortex

Computron,

This Transformer is a Gestalt, formed by the five Technobots.

Constructicons,

Group of six Decepticons. Together they transform into Devastator. Their names are:
Bonecrusher
Hook
Longhaul
Mixmaster
Scavenger
Scrapper

Construction Patrol,

Autobot Micromasters. This is one of the Micromaster Patrols. The group is formed by:
Crumble
Groundpounder
Neutro
Takedown

Constructor Squad,

Decepticon Micromasters. This squad is one of the squads of Micromaster Combiners. The group is formed by:
Excavator
Grit
Hammer
Knockout
Sledge
Stone Cruncher

Cosmos,

Autobot. Transforms into a spaceship. He is one of the Mini-Vehicles.

Countdown,

Autobot. Countdown himself transforms into a moonbuggy. His base transforms into a launchplatform. He is also sometimes referred to as Micromaster Rocket Base.

Counterpunch,

See Punch/Counterpunch.

Crankcase,

Decepticon. Transforms into a car. He is one of the Triggercons.

Crash,

Decepticon. Transforms into a futuristic bomber. He is one of the Scope Master.

Crossblades,

Autobot. Both robot and casing transform into a helicopter. He is one of the Mega Pretenders.

Crosshairs,

Autobot. Transforms into a buggy. In The Rebirth, part 2 his weapon was modified into an exosuit for Pinpointer. Due to this proces, he became a Targetmaster.

Crumble,

Autobot micromaster. Transforms into a construction vehicle. He is a member of the Autobot Construction Patrol.

Crystal City,

City on Cybertron. Optimus Prime called it the most beautiful place on Cybertron. It was destroyed by the Constructicons, after they tricked Omega Supreme away from it.

Cutthroat,

Decepticon. Transforms into a monster. He is one of the Terrorcons.

Cybershark,

Maximal. Comes from the Beast Wars. Transforms into a great white shark.

Cybertron,

Homeplanet of the Transformers. Megatron left Shockwave in command of Cybertron, after he left.

Cybertrons,

Inhabitans of Master, they made an alliance with the Autobots.

Cyclonus,

Decepticon. Transforms into a futuristic jet. He is second in command of the Decepticons, but he has no intention to take the leadership from Galvatron. He is one of the Decepticon Planes. In The Rebirth, part 2 his weapon was modified into an exosuit for Nightstick. Due to this proces, Cyclonus became a Targetmaster. (see also Cyclonus, Targetmaster)

Cyclonus,

Decepticon. Transforms into futuristic jet. Nightstick transforms into his weapon. He is one of the Targetmasters. (See also Cyclonus) (this picture is taken from Five Faces of Darkness, part 1, long before he became a Targetmaster)