While this character didn't appear in Generation 1, there was some basis in The Transformers: The Movie. The unreleased G1 ...

Leobreaker's concept art initially gave him a faux ... and convince him to join Optimus Prime against Unicron. His reincarnated from in Transformers: Energon was a borderline mindless "ghost ...

The concept of Unicron was first introduced in 1986’s animated Transformers: The Movie. It was something that originally looked like a planet but turned out to be a massive Transformer.

Optimus Prime and his loyal Autobots are facing their biggest threat to date in the upcoming “Transformers: Rise of the Beasts” — the world-devouring Unicron. “How big can this guy be?” ...

"This is about the fate of all living things. Unicron is coming," says Primal, voiced by Ron Perlman. The Transformers: Rise of the Beasts trailer--seen below--then highlights that this ...

Based on the Beast Wars line of comics, games, toys, and TV shows, the seventh entry in the exhaustive saga begins with a lengthy prologue about a planet-devouring Transformer, Unicron (Colman ...