Sally and Bunnie were both in a Robotropolis Junkyard, the two of them farting up a storm as the two of them giggled with each of their loud poots. Sally wasn't wearing any clothes, except her blue boots.
"My stars, Sally Girl! I had no idea y'all were this gassy!" Bunnie gasped, letting out a brassy poot that actually made her butt jiggle, despite it being robotic.
Sally winked at Bunnie, wiggling her furry farting butt at her. "Oh you betcha, Bunnie. Little Tails loves it when I fart for him.
Sally touched her butt to Bunnie's metal crotch, happily ripping a loud fart that caused the half-robotized rabbit to gawk and blush at how arousing Sally's fart was.
"My goodness! Y'all could overheat ma'h robotic parts with that gas!" Bunnie gasped, letting out a loud fart of her own that warmed her butt.
"Oh don't worry about that!" Sally bent over, letting out another brassy tuba fart that shook the entire junkyard.
"Phew! That one stunk to high heaven!" Bunnie giggled.
"Plus, the air around here actually smells better." Sally giggled as she and Bunnie continued farting.
Meanwhile, several of Robotnik's SWATBots gathered around the two gassy female Freedom Fighters, watch them both rip ass as several junk piles began melting from their butt fumes, both girls showing off their farting butts in a manner most pleasant.
"Sir, should we not do something about those two?" Snively asked, he and Robotnik watching Sally and Bunnie fart on a monitor.
"Not now, Snively. This is good." Robotnik responded, rubbing his pingas. "This is very, very good." Snively simply gave a blank stare as Robotnik began fapping to the two gassy girls, turning his focus back on them.