The character known as "Bart," likely a romanization variant of "Bat," recurs across the franchise. In *Shin Kyūseishu Densetsu Hokuto no Ken: Raoh-den Junai no Shō*, Bat serves as a supporting figure aiding Kenshiro and Shū in defending villagers against Souther’s forces. A subplot centers on his return to his homeland, though the narrative does not delve into the personal motivations or history driving this journey.

Within the film’s scope, Bat provides logistical expertise during the clash with Souther, reinforcing his established role as a resourceful ally in Kenshiro’s post-apocalyptic struggles. His steadfast dedication to Kenshiro’s mission is underscored through collaborative efforts with characters like Lin. The provided materials do not expand on his broader background or development in other media.