Patreon Prompt 527

Prompt: After being exposed to a special kind of Joker toxin, Batman is turned into a gassy BBW. Unfortunately for the villains of Gotham, her drive to fight crime remains, and she now has both weight and stench in her arsenal.

Despite the caped crusader's best efforts, it was only a matter of time befer he fell victim to the Joker's toxin. Specifically, Batman had been exposed to a type of gas that the clown criminal nicknamed "Gassy, Girl, Gargantua Serum." In the wake of a raid on a warehouse where he was exposed to the gas, it was only over the course of several days spent in the bat cave did he learn the cruel and unusual punishment that awaited him.

It started off with a massive increase in weight that left Batman waddling around his headquarters. Still trying to get used to his doughy belly, he had little chance to prepare for the constant flatulence that erupted from his behemoth backside. The deluge of belches from his thickening throat let him feel the extra heft being added onto his expanding bosom. Though he wasn't able to see it with his own eyes thanks to his fatty foopah, he could feel his manhood sink into his body to form his new womanhood.

A week went by with the city of Gotham thinking that their hero had abandoned them. In his place, a new vigilante began to patrol the streets. Dressed similarly to the bat, the woman dished out justice through her own unique way. Soon, all criminals learned to fear the swift strikes of her barrel-like gut and the gas that erupted from both of her ends.

The newly deemed Bat Behemoth’s wave of crime fighting came to ahead when she infiltrated the Joker’s hideout. As she fought off the goons with fat and flatulence, the clown criminal looked on with sick glee. Even if it did mean another one of his plans would be foiled, the sheer comedy of watching the gassy woman waddle about in front of him was enough to keep him entertained, even as she used a grappling hook to send her slobby form careening straight into him.