Little is detailed about Bagheera’s life before Dreadpool began murdering the inhabitants of the Ideaverse, however it can be presumed that it followed much the same path as Bagheera from the collection of stories, The Jungle Book.
Upon seeing Dreadpool and Frankenstein's Monster kill their friends, Bagheera, Mowgli, and Baloo attacked them, but were ambushed by the tiger Shere Kahn. Upon seeing Mowgli slain by the tiger, Bagheera stopped fighting, and had his throat slit by Dreadpool.
Later, all the characters from Ideaverse were resurrected by Sherlock Holmes, who has restored that universe.
Bags was a member of the Midnight Wreckers, a group of scavengers who assisted Gears Garvin in finding robotic components to help and fix robots during the robot revolution.
After raiding the ruins of a Robowerx factory owned by Baintronics, the Midnight Wreckers were followed by a Baintronics roboticist named Rahman Bashara who wanted to help the fight for A.I. independence. In turn, a platoon of Bain-Robots trailed Bashara and attacked the base. Their attack coincided with an assault from the A.I. Army, who wrongfully believed Garvin to have been working against A.I.s. Bags fought against the Bain-Robots until Bashara disabled them. After the A.I. Army soldiers were convinced that their attack was misguided, the Midnight Wreckers parted ways with Gears and left the hideout, with Bashara having joined their ranks.