Why did they make unicron?

Unicron was created as a character in the Transformers franchise to serve as a powerful antagonist and a symbol of chaos and destruction. Introduced in the 1986 animated film "The Transformers: The Movie," he represents a cosmic threat to the Transformers' universe, embodying the ultimate evil that the Autobots must confront. His ability to transform into a planet allows for dramatic storytelling and high-stakes conflict, enhancing the narrative depth of the series. Ultimately, Unicron's creation adds complexity to the Transformers mythology, illustrating themes of good versus evil.