Small earthquakes appeared in San Francisco, causing some buildings in the city to fall under the Earth's crust, around the same time Dr. Quinn has to go to a meeting in the area. When the Calico crew arrives, they find giant holes in place of buildings, and the Eartheater was in one of them. The crew uses their head lights to get away from the Eartheater, but it continues to follow them. Godzooky called Godzilla, and the Eartheater started to fight Godzilla. The Eartheater attacked Godzilla, and Godzilla attacked back with laser eye beams. The Eartheater then used a sonic blast which stunned Godzilla and retreated underground.
The Calico crew was planning to knock out the Eartheater with gas bombs, just when the Eartheater burrowed up from the ground. Godzooky called Godzilla again, and as the crew escaped, more tremors started happening, which made them loose control of the car. Godzilla picked the car up and put it somewhere safe, and started fighting the Eartheater again. Godzilla breathed fire on the Eartheater, and the monster used his sonic blasts, which Godzilla dodged. Godzilla started to grapple with the Eartheater until the Eartheater escaped Godzilla's grip and used his sonic blasts to escape from Godzilla.
Godzilla and the Calico crew looked for the Eartheater, and they found the monster at the Golden Gate Bridge. Godzilla immediately used his laser eyes on the Eartheater. The Eartheater tried killing Godzooky with his tail but Godzooky flew out of reach and the Eartheater hit the bridge under him instead, causing it to collapse and the Eartheater to fall down into the water, where he turned into mud.
- The Eartheater can emit sonic blasts from his antenna that can stun enemies temporarily. These can also be used for burrowing.
- The Eartheater's tail has a gear-shaped tip, which can be used to hit things with.
- Contact with water will turn the Eartheater into mud.
- The 43rd issue of DC Comics' Scooby-Doo Team-Up mentions that the Hanna-Barbera superheroes Frankenstein Jr. and the Impossibles defeated the likes of Godzilla, the Eartheater, and the Cyclops Creature, all of whom make a cameo in one panel alongside an unidentified fourth monster, actually a recolored version of the Time Dragon with flaps under its arms and pointed spikes on its back. The monsters were apparently under the control of (if not created by) the Mad Inventor.
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