The "Checker-Wrecker Ball" is a simple wrecking ball covered with an orange and brown checker pattern. It hung from a long chain attached to the underside of Doctor Robotnik's Egg-o-Matic hovercraft and is the first of many Egg-o-Matic weapons that Robotnik has used. The combination of these items became unofficially known as the Wrecking Ball Eggmobile. Robotnik used this to battle Sonic the Hedgehog in the Green Hill Zone in the Sonic the Hedgehog video game and used it again in Sonic the Comic Issue 2.
The term "Checker-Wrecker" has not been used in STC, but rather came from the first issue of the American Sonic the Hedgehog comic published by Archie Comics.