Tigerhawk was formed when the Vok aliens de-Sparked and fused the bodies of Tigatron and Airazor together. They intended to create a super warrior they could control and bring justice to the time-disrupting Transformers on prehistoric Earth. Unfortunately when the two extracted Sparks united and entered Tigerhawk's body, he found a different purpose and a unique personality emerged.
Razorclaw is a former Maximal from an alternate Beast Wars Universe who became a Minion of Unicron. Tigerhawk that was corrupted by the Vok to become Razorclaw, and then killed his universe's Megatron. Unicron abducted Razorclaw to be his fourth and final general.