Blitzer

Blizter is a Deceptitrain and Hunter's sidekick (he became his sidekick when Hunter was ressurected), and has Rusty's shape, with robot arms like Morley but he has 2 robot eyes. But soon after he decided to quit the Deceptitrains, and help freed Thomas. He joins the Trainbots and after the battle, and after Smaurai OpThomas Prime Supreme killed Steam Prime, his eyes turned blue, and his Decepticon logo was repainted into an Autobots logo.

Bio
After Hunter was ressurected he made Blitzer his new sidekick. But he finds him annoying, and a complete idiot. But after he was being bullied, and being the laughing stock of the Deceptitrains, then seeing fear in the foals he feels remorsful, and he frees Thomas and they both escape before Hunter takes off into space. Then he explains that when Megatron inserts the Terracon crystal into Tirek's ashes he will become a Terracon. Blitzer then helps our heroes battle the Deceptitrains using his gun, "Lil' Blaster" [a hand-held, anti-aircraft Browning M1919 A4 machine gun] Blitzer then risks his life to get Tirek's horns away from Megatron in which he succeeds. Then when Hunter returned

Rehabilitation
But later in Dark Side of Mars, Blitzer joins the Traibots. This is due to being tired of being bullied, calling names, and the laughing stock of the Deceptitrains. And earlier when Hunter wounds Thomas he looks to Yuna, Skyla,and Nyx and sees huge fear in their eyes. When he sees their fear he starts to feel remorse. And he helps free Thomas and they both escape before Hunter took off into space. Then he explains that when Megatron merges the Terracon crystal with Tirek's horns, he will become a Terracon.

Trivia

 * He made his appearance in Dark Side of Mars.
 * Blitzer returned in Thomas' Adventures in Transformers: Prime.