Heatrock is an Autobot from the Generation 1 continuity family.

Heatrock, the sixth Protectobot, turns into shorts, or a jumper. Poor fellow.

Heatrock (ヒートロック Hītorokku) is all about the drills, drills, and drills. Heatrock forms the torso of Gaia Guardian and the chest of God Guardian.

Fiction

Kre-O online comic

Heatrock was with Skyfeather when they tried to stop Swindle from stealing Metroplex's transformation cog. Bad at Fighting? Rescue Team Protectobots, Dispatch!

Timelines

Rook, Skyfeather, Heatrock, and Medix were backup Protectobots. Customization class Medix bio

Games

Transformers Roleplaying Game

Heatrock was a substitute Protectobot. The Enigma of Combination

Merchandise

G Guardian

Heatrock: for when Nosecone's busy.

• Heatrock (Candy toy, 2012)
  • Accessories: Blaster

Heatrock is a snap-together candy toy model kit produced by Kabaya for their G Guardian series, coming in an individual box packed with a stick of (chalky) gum. They transform from a robot into a drill tank. They form the torso of Gaia Guardian and the chest of God Guardian.

They're the only G Guardian figure that requires a degree of partforming, with their vehicle mode drills being detached during the transformation and reattached into the robot shoulders.

Notes

• Kreon Heatrock uses existing Kre-O pieces as part of their build; they use the Ironhide helmet (though it seems to sport a mouth-plate), but the shoulder-drill arms appear to be unique pieces (to make them better match their original counterpart).