Yesterday's Hauler-Bot was more than just the truck that turns into a robot. He also included a car-carrier trailer (scaled and shaped to fit the Playskool Go-Bots aesthetic) that also transformed. It split into two, with the upper portion of the carrier turning into a pterodactyl, and the lower into a wheeled turtle (or maybe it's an ankylosaur). Neither were named, so the whole assembly is collectively known as Hauler-Bot.
As an additional 'Super Mode,' the Hauler-Bot robot can stand on the turtle base and wear the pterodactyl on his shoulders. I don't think that will warrant a separate drawing, unlike some of the more complicated Super Modes elsewhere in the line.
