The Brave Express Might Gaine takes these newly-crafted themes to their logical conclusion. Here the robots are no longer "spirits," but have personalities granted by advanced Artificial Intelligence. These robots were designed and built from the ground up by the late father of the main character: billionaire crime-fighting teenager and railroad magnate Senpuuji Maito. He acts as a Bruce Wayne character of sorts, taking command of the Brave Express robots in the field and fighting crime himself on the front lines. The antagonists are separated into multiple criminal factions, some at odds with each other, extending the basic villain structure used in Da Garn. Some Japanese fans consider Might Gaine the best of the Brave series, and it is often cited as the one that best expresses the idea of the Brave "formula".

The main exception is in the series' controversial ending, which is often interpreted by critics as signs of relations souring between Sunrise and Takara. In the ending of Might Gaine, the characters find out that they are merely fictional characters whose conflicts are artificially generated so that their evil otherdimensional mastermind can sell toys and merchandise. Maito reacts to this with a speech that Japanese critics interpreted as a defense of Da Garn's character-driven storytelling style, which Takara is generally believed to have disliked. After making his speech, Maito destroys the enemy, thereby asserting his own "reality" as a true character and not a merchandising tool. This analysis of the series often considers many plot elements throughout the series as Sunrise effectively "striking back" at Takara for forcing them to create shows with less plot in order to cram in more toy designs and action sequences. For instance, many robots in Might Gaine appear with no explanation, or arbitrarily transform into alternate modes that make no particular sense.