Brave Police J-Decker returns the series to a subtly lighter tone, focusing more on the concept of "robot as human-built AI construct" emphasized by the previous season's series, The Brave Express Might Gaine.
In the year 2020 Fourth-Grader Tomonaga Yuuta stumbles upon Deckerd, a humanoid robot under construction by the Japanese police, built to fight advanced forms of crime. Yuuta's constant contact with Deckerd gives the robot an understanding of human emotions or in essence, a "heart" and personality.
After an attempted theft by the first villain of the series, Dr. Gauss (who is apprehended and arrested by Deckerd) Yuuta is recruited as the "boss" of the "Brave Police" as a result, a true human/robot partnership occurs.
Later in the series, the Brave Police: Scotland Yard Division was eluded to in episodes 25 and 41, but never fully expanded upon.
Braves is a intensely merchandise based series. The main attractions are the transforming robots. There are two lines of transforming robot toys. STandarD (STD) and DeluXe (DX). The Standard line are smaller and simpler toys that usually involve pull-apart transformations/combination but they often achieve a more show accurate proportion whereas the Deluxe line have show accurate transformations and combinations.