Cloning

Cloning is the process of creating a living organism that is exactly the same as another living organism by replicating their DNA. You might wonder how Transformers have clones, seeing as how they're machines, but trust it, it happens a lot more than you would believe.

Fiction

Generation 1 cartoon

The Insecticons possessed cloning abilities that allowed them to create clones of themselves using metallic debris. Using this, they were able to increase their numbers from three to potentially hundreds of thousands. A Plague of Insecticons The Decepticons attempted to use the Insecticon clones to produce energon by having the Insecticons ingest organic food, but the Insecticon clones were destroyed by Morphobots. Quest for Survival

Dreamwave

After the Great Shutdown, Shockwave began research into cloning. He developed several clones of prominent individuals, using technology he had gained when Megatron struck a deal with the Quintessons over the Aerospace Extermination Squadron. When Optimus Prime and Ultra Magnus overthrew his regime, Shockwave's clones were not yet ready. The Battlechargers discovered his lab while looking for a CR chamber, finding several of the clones who had yet to be activated. However, the computers were processing the information that Shockwave had downloaded from Vector Sigma, spilling into whatever available memory it could find...including Sunstorm, a clone of Starscream. Generation One ongoing

From Teletraan I: The Transformers Wiki, a Wikia wiki.