Bertha the Greninja

Bertha is an anthropomorphic female Greninja, with a corpulent appearance of huge thighs and ass, and of course her favorite addiction is anal sex. When she has unbridled bubble farts, she usually chooses the help of a male who wants to fuck her bubbling anus to have anal sex and try to suffocate the gaseous bubbles, the more they burst around the long penis and balls, the more pooty liquid will continue to spread until it is dirty. And now we get to what was actually requested, and why she needed her shorts down; bubble farts. Never really did somethin quite like it, so it was fun to experiment with. I see it as some kind of ability she's got, though it's kinda more just a party trick or somethin to do when she's bored, really. That big one's probably roughly the max size she can do with one steady fart/a couple quickly back to back before the bubble gets away from her.

Just watch for when those bubbles silently pop, cause that's when their gassy payload disperses.

Bertha's physical appearance: Greninja is a bipedal, frog-like Pokémon. It is mostly dark purple with a grey chest, a white triangular marking over each eye, a light purple four-pointed star on each thigh, and grey on the lower half of its face. It has red eyes with white pupils and its mouth is hidden behind a large, pink tongue that wraps around its neck and extends outward behind its head. Running down the middle of its head is a fin-like extension, and there is a similar fin on each side of its head. Light purple webbing connects its head fins. There is a large, white bubble-like bump on each elbow and knee. Its back feet have two toes, while its front feet have four toes. Each digit has a bulbous tip and yellow webbing.