Cyclonus (Unicron Trilogy)

Cyclonus, later known as Snowcat, is a Decepticon and supporting antagonist in Transformers Armada and Energon.

Armada
Cyclonys was one of the four original deceptions who arrived on Earth, alongside Megatron, Starscream and Demolishor. He, alongside Starscream, serve as air-support througout the hunt for the minicons. He bonded with the minicon Crumplezone, which was one of the first discovered on Earth. As his alternate form he took that of a flat-nosed combat-helicopter.

After Starscream's death, Cyclonus and the other Deceptions joined forces with the Autobots in order to fight Unicron. In this battle Galvatron persihed as well, which led to all Decepticons, including Cyclonus, to join the Autobots side.

Energon
Cyclonus is stationed to guard a base of Earth's moon ten years after Unicorn's and Megatron's death. He was later recruited by Scorpnok to resurect Megatron, which he agreed to. After Megatron's resurection he managed to convince Demolishor to rejoin the Decepticons, and a new war began between the two Transformer-factions.

Later, after being damaged in battle, Megatron upgaded him, giving Cyclonus a new body, which transformed into a snowcat. Ironically, the Decepticon also took the new identity of "Snowcat".

Later, when Megatron flew into the Sun created from Super Energon in an attempt to kill Unicron, Starscream and Mirage followed their leader into the Solar inferno, presumably perishing alongside him. Snowcat and Demolishor decided not to follow and were last seen floating in space, pondering what they should do next in their life.

Personality
Cyclonus was one of the most idiotic Decepticons in Megatron's army, throwing himself usually into combat without a plan. He loved war and fighting, which Megatron saw as useful, despite Cyclonys' lack of intelligent. Cyclonus was also one of the more loyal Decepticons, who usually always followed his master's orders, though in secret he sometimes showed spite againts Megatron.

Despite being a ruthless Decepticon, he had a good friendship with Demolishor, and the two often went into combat together, enjoying the carnage they caused.

Tirvia

 * He is based on the character with the same name from 1986's The Transformers: The Movie.
 * He does not appear in Transformers: Cybertron.