The third and final movie in a trilogy.

Based on the manga by Tetsuhiro Koshita, Bakusou Kyoudai Let's & Go!! has two main seasons evolving around the Go brothers and the TRF Victorys. The third season, Bakusou Kyoudai Let's & Go!! MAX evolves more around two new main characters, but the primary idea is the same... Racing! Let's & Go!! focuses on Retsu and Go Seiba, two young brothers who receive racing cars called "Mini 4WD" by Dr. Tsuchia. From there on, the series portraits those two boys, training and customizing parts to later on participate on Japans Cup, where all of Japan's racers enter to be the best of the best!

Tomoe Shiro, a formidable racer with a very promising career, experiments a U-turn when a serious accident puts his life at stake. He recovers miraculously though when his heart is replaced with the engine of his own racing car. However, because of that very reason, race regulations demote him to the category of a mere mechanical part of the vehicle and is deprived from the right to participate as a pilot in regular races. Only in a far away colonial planet, along with a multitude of other charismatic pilots also vetoed from participating in regular competitions, will he be given the opportunity to race for his pride and the money of the prize. And so this exciting rally starts!! (Source: Official website)

Mechadock is a powerful race car obtained from a simple economy car, which is able to race on any ground.