Thundercracker (Armada)

Thundercracker is a Decepticon in the Armada and Cybertron portions of the Unicron Trilogy.

Thundercracker suffered from low self-esteem and longed for approval from authority figures to validate his existence. He was willing to work as hard as necessary to gain attention and praise from Megatron, but when all his efforts were ignored or taken for granted, he grew frustrated. Thundercracker felt the need to engage in ever more risky and reckless behavior in an attempt to gain Megatron's notice. Many predicted this would lead to his destruction.

When next we see Thundercracker it is over ten years later, loyally serving under Starscream during the search for the Cyber Planet Keys. In the intervening years he became something of a jokester and goofball. This has often gained him the attention that he craves. Though frequently, especially when Megatron is the brunt of the joke, it is far from positive attention. Thundercracker doesn't seem mature enough to tell the difference.

Armada Cartoon Continuity
The character "Thundercracker" is never seen in the Armada cartoon. When Starscream gains his Powerlinx coloration, however, he happens to look just like Thundercracker. In Armada (although not Micron Legend) he specifically says "I look like Thundercracker," proving that, although he is not seen, Armada Thudercracker must exist in this continuity as well.

Dreamwave Comic Books
Information not yet added.

Toy
While other toys were given the "Powerlinx" prefix when redecoed for the second part of the Armada line "Powerlinx Starscream" was released in the US as "Thundercracker." This is likely due to the new version's resembling Generation 1 Thundercracker. G1 Starscream,  Thundercracker, and  Skywarp were the same toy with different color schemes and vastly different animated and comic book personas. Hasbro decided to follow suit with the UT version of the trio.