The Transformers (1984)

S2E40 The Key to Vector Sigma (2)

The Decepticons seize the Key that unlocks Vector Sigma's power. Upon harnessing Vector Sigma, they discover that the Key can also transform organic beings into mechanical forms. Megatron plans to unleash this weapon on Earth, forcing the Autobots to seek new allies for the upcoming fight. However, the creation of these allies will come with significant consequences.