Grimstone

Grimstone is a fictional character in the Transformers series.

Transformers: Power Core Combiners

Grimstone is the first Power Core Combiner to use animal forms instead of vehicles like his team members. According to his biograpjy, Grimstone has dreamed of power and the privilege it brings, yet he considers the needs of others before himself. His belief is that it is the responsibility of the powerful to protect those less fortunate; and with his newly formed Power Core team, he will enforce that belief.

A set of dinobots toys were released as part of the "Power Core Combiners" line in 2010. This set was a new mold and came with four Dinobot drones: a Parasaurolophus, a Pachycephalosaurus, an Ankylosaurus, and a Dimetrodon mislabeled as a Spinosaurus, all of which combine with Grimstone to form a larger robot.