Transformers One

Before they became the famous Transformers, Orion Pax (the future Optimus Prime) and D-16 (the future Megatron) were ordinary mechanical inhabitants of the planet Cybertron who still lacked the ability to transform. While D-16 fully respected all the relatively strict regulations in place on his world, Orion Pax broke them as much as he could. Still, they were best friends who would stick their hand in the melting pot for the other. Through a series of unfortunate circumstances and Optimus' adventurous nature, they find themselves on the run from justice, where they are joined by Bumblebee the toy and the badass Elite-1. Together they travel to the place where their planet was born, a forbidden corner of the world hidden from the eyes of mere mortals, where they discover the legendary warrior Alpha Trion, who has protected their homeland since time immemorial. It is from him that the four adventurers gain the ability to transform at will. But before they can properly "go wild", they must use their newfound skills for more important purposes. Cybertron is in mortal danger, and only those who are truly exceptional can save it. But they must stick together, a task as difficult as saving the world.