Guinea pigatron

Presumably native to Cybertron, guinea pigatrons are creatures proverbially used as the subject of tests. It is likely that some aspect of their physiology, such as a similarity to Transformers, or their ease of care contributes to this common usage. The Autobot Run

Fiction

The Transformers cartoon

Megatron told Starscream to transform in order to test the Transfixation device. As always, he's a whiny little Scraplet who always complains... The Autobot Run