Megatron and Bee

Main characters
Orion Pax (now Optimus Prime): A bold and ambitious worker who dreams of finding the Matrix of Leadership and restoring Cybertron to its former glory.
D-16 (now Megatron): Orion's best friend. Initially, he strictly follows the rules and is loyal to Sentinel Prime, but after the truth about the leaders' betrayal is revealed, his anger transforms him into the ruthless Megatron.
B-127 (future Bumblebee): A cheerful and very talkative bot working in the lower levels. In this film, he already begins to demonstrate his combat skills and passion for adventure.
Elita-1: A disciplined and strong warrior who is initially skeptical of Orion's plans but eventually becomes an important member of the team.

(You are Bi-127, Megatron-Bot)
Main characters: The plot centers on Orion Pax (now Optimus Prime) and D-16 (now Megatron). Here, they are simple robot workers who can't even transform and toil in the mines.
Friendship: Orion and D-16 are best friends, practically brothers. Together, they dream of a better life and search for the legendary Matrix of Leadership to save the planet from an energy crisis.
Plot: The heroes discover the terrible truth about Cybertron's ruler (Sentinel Prime), who betrayed his people. They gain the ability to transform and lead a rebellion.
The Split: It is in this film that their paths diverge due to differing views on justice and vengeance. Orion chooses the path of protection, while D-16 chooses the path of tyranny, transforming into Megatron.
This is the story of how the feud that divided an entire civilization into Autobots and Decepticons began.