Wii Fit Trainer was in the Delfino Plaza stage used for the Brawl tournament, doing stretches as the stage came down to the front of the plaza. Peach and Zelda were there, both of the princesses wearing tight jeans as Samus wasn't present, due to her fighting Ridley in Brinstar with Pikachu.
"Let's see how this stupid Wii Fit Trainer likes me now after wearing these tight jeans!" Peach admitted as she walked over to the Wii Fit Trainer, tapping her on the right shoulder.
Wii Fit Trainer turned around, only to be greeted by Peach's butt in tight jeans. Princess Peach farted loudly, her deep pitched, tuba like flatulence blowing in Wii Fit Trainer's face as some of the leaves on the four palm trees fell off. with Zelda's eyes widening.
"How do you like that, Wii Fart Face?" Peach commented as she slapped her butt, letting out another fart. "Not so willing to pass gas now, are you, you worthless joke character?"
Wii Fit Trainer stood up, pushing Peach back with both her her hands. "Oh, so that's how you want to play, huh? Well, I better put you and your nasty, gassy butt back into balance..." Wii Fit Trainer then performed the tree pose, clenching her butt cheeks as she let out a louder fart, managing to outdo Peach as the entire area shook.
Peach screamed as she fell flat on her gassy butt, with Zelda covering her ears due to how loud Wii Fit Trainer's toot was. Wii Fit Trainer then wiggled her butt clad in yoga pants in Peach's face, letting out a loud toot that was so putrid it melted the makeup on Peach's face.
"Don't make me have to change up my diet," Wii Fit Trainer giggled as she placed her hands on her hips, facing Peach as she shook her head. "Because I can assure you, I won't hesitate to whip your butt into shape."
Zelda farted in shock as she trembled, shaking her head. "Oh goodness... things are getting worse than I imagined..." She gulped, glancing at her butt as she tooted again.
Peach stood up, poking Wii Fit Trainer in the face, "Let's get one thing straight here, white trash! I'm the resident gasbag, not you!"
"Oh, really now?" Wii Fit Trainer smugly remarked as she folded her arms, letting out a wet toot. "Because I'm going to go through a lot of well balanced and organized yoga pants when I'm done with you..."
The Piantas and Nokis watching looked at each other in horror as they stayed inside their buildings, with Zelda trying to ease tension between the Wii Fit Trainer and Peach, things becoming more treacherous.