These are the Transformers Villains from the Transformers franchise which includes TV shows and cartoon series, the live-action films by Michael Bay, various comic books, and other spin-offs of Transformers, such as Beast Wars: Transformers, and Beast Machines: Transformers. These are mainly Decepticons and even humans who either have a xenophobic nature towards the Transformers and seek to eradicate them or side with the Decepticon for their own selfish reasons. But this category fits in with any villain, provided they originate from the Transformers multiverse.