(Title corrected by a user) I mean, Mappy has a "lore". Dig Dug has a "lore". But I can't seem to find Bomberman lore.
Definitely include manuals from other regions! One of the greatest games of the 1990s, Secret of Mana, the characters did not have names — outside Japan. Once we all got online and we found out about Seiken Densetsu 2 (lit: Legend of the Holy Sword 2), we learned their names. The boy is Randi (not Randy, but the feminine version), the girl is Primm, and the little faerie/sprite girl is Popoi (which I guess is meant to be pronounced Poppy?).