|Species||Human/battle tank/Tyrannosaurus rex hybrid|
|Place of origin||Mutogenic reactions of the rain forest|
|Affiliation||Evil Rat Pack|
|Relations||Rat Pack (allies)|
Cat Pack (rivals)
Stego-Striker (primary rival)
|Occupation||Rat Pack member|
King of the Forest
|Abilities||Can transform between tank and tyrannosaurus mode|
Can fire rockets from his face
|Behind the Scenes|
|“|| Whether it's fighting or eating when this king of the Cretaceous era gets finished there's nothing left. He's a walking armored arsenal, blowing up terrain and slashing at anything that moves!||”|
— Strengths, as listed on his bio card
Tankasaurus Rex is a member of the Evil Rat Pack from the Attack Pack transforming toy line from the 1990s produced by Mattel as an extension to their Hot Wheels lineup.
Although he is listed as a member of the Evil Rat Pack, it is likely that he is closest to his fellow Rat Pack prehistoric allies, the Battle Birds Nightslayer, Splitfire, and Slaughter-Skito, and presumably holds the largest rivalry with the Cat Pack's Stego-Striker as well as their Battle Birds Screwdiver, Sky Vice, and Terror-Dactyl.
In an ancient, undiscovered area of the rain forest, a strange force field developed over eons of time. It lay undisturbed until the fierce fighting of the Attack Pack altered the environment. Mutogenic reactions were set in motion, resulting in gigantic beasts that were part military machine and part mutant dinosaur. This mighty mix emerged as highly intelligent prehistoric predators that could shake the delicate balance of power in the ongoing struggle for the rain forest.