The Mega Mecha Tank was a vehicle used by Crocbot, Dr. Robotnik's Downunda Sub-Boss. Fitting into it so that only his body above the waist was exposed, he used it as a getaway vehicle after the Downunda Freedom Fighters and Tails defeated his CD-ROM Ram. Team leader Walt Wallabee prevented his escape, knocking him into the Great Crater with an explosion. As a result, the Mega Mecha Tank became fused to Crocbot, and remained so until he was defeated yet again by the Downunda Freedom Fighters. (TMS: #3, StH: #49, #50, SSS: #4)