Yuffie's ribbits, though quieter than her normal speech, did eventually get too much, and after the rest of the day's travel, they turned her normal.
"Gawd, you all suck!" She fumed.
"Sorry, we may have taken it a little too far," Tifa croaked.
"A little?! I ate so many flies! Ugh, I feel so ill..." The Wutaian groaned.
She then scanned the horizon.
"Where we headed anyway?"
"Shinra Mansion in Nibelheim, way less risky than Midgar and closer," Cid said.
"Ah. So, we making camp?"
"Yup. Don't go chasin' moths in the night," Barret said.
Yuffie flipped him off in response.
The next morning, Yuffie shuffled from her sleeping bag, and felt an odd tightness on her chest.
"...Whoa, wait, did my bra and shirt shrink or have I got bigger?"
To her delight the latter seemed to be the case - but it did mean some discomfort.
Still, she travelled and fought with the others, their trek to Nibelheim fraught with more monster encounters and battles, until making camp for the night again, when Yuffie became aware of a small problem - some patches of green on her inner thighs.
"Crap... some lingering stuff from the frog? Okay, I've got cures..."
They did not work, but luckily, she could hide them. They'd reached Nibelheim after three days, and Yuffie had become aware she was a little shorter, even if her chest was larger. More green patches were around too, but some old makeup snaffled from an unsuspecting house fixed that up.
"Okay, *croak*, this library is huge so we'll all need to search. And Shin-Ra's admin being as clean as it is, the right stuff is probably everywhere if it's even here at all," Cloud said.
Their searches took days, shelves and storage crates being plundered, and all the while few noticed Yuffie's changes - except that she was unusually quiet.
"It's kinda scary, makes me think she's up to something," Nanaki whispered to Aerith.
"Maybe she's found some books on materia?"
It was the fourth day when a breakthrough was made, Barret pulling out a crate that seemed marked right.
"RTM-GONG. Think it might be our stuff?" He asked Cait Sith.
"Let's find out..."
Inside lay a number of vials of potions, and some folders. The potions were labelled only with numbers on the lids, all the same colour... and infuriatingly, no distinction was made between 6 and 9, nor was the handwriting on the lids clearly showing a difference between 1 and 7.
Incidentally, they only bore 1, 7, 6, or 9
"Yeah, a doctor did this. G... Farannis? Farariis?" Aerith squinted at the sloppy writing.
"Gast Faremis," Vincent nodded.
"Ah, one of Hojo's predecessors if I remember," Cid said.
"So what's it all *croak* say?" Nanaki wondered.
"Oh phew, the files are typewritten. Looks like we might be in luck, these are apparently cures for the condition, but there's a catch," Aerith reported.
"What's that?" Tifa croaked.
"They're gender specific... They turn you back into your correct gender, but the wrong one can cause a permanent change. 1 and 6 is for females, 7 and 9 for males."
Nanaki, Tifa, and Cloud groaned.
"And nothing about *croak* species?" Nanaki said.
"Sorry, looks like it's humans or bust."
"Well... I'll take one of the ones that might be a 7, Tifa takes a 1?" Cloud suggested.
"Hey, it's fifty fifty, and I'd rather be male than a frog-thing," Tifa shrugged.
"Uh, does it say anything else about the condition?" Yuffie wondered.
"Well, it lists what the transformed people can do, and... oh. The cure makes you able to shift between, and apparently your tongues can cause a... uh oh. Yuffie, have you had any problems lately? Like, green patches?"
The Ninja sighed.
"Yeah... and I think my boobs got bigger, and I'm getting shorter."
"It's a different change. Within a few days you'll be smaller and almost all frog, but super-strong and fast. Look."
Yuffie studied it, noting the pictures of some previous transformed victim, the final thing about quarter their original height.
"And no cure for that. Thanks, guys," She sighed.
"...We're sorry, we didn't know," Tifa said sadly.
"...Just try your cures and then we can maybe figure out some fix for me."
Tifa and Cloud did so, Nanaki opting to wait and maybe see which cure meant what. The pair took their potions, and then groaned, falling to their knees.
"...Were they off?" Vincent wondered.
"No, I feel something... gha!" Tifa groaned, as her skin changed back to flesh-tones, but something was wrong.
Her body seemed to be expanding a little, growing a little wider at the shoulders and flatter at the chest. Cloud, meanwhile, had lesser changes, simply going to normal skin, but remaining female.
"...I think we got the wrong ones," Tifa realised as he stared down at his now-male chest.
"Crap," Cloud sighed, now permanently female.
"...Can I laugh? I wanna laugh, cos now my boobs are bigger than Tifa but, kinda insensitive?"
"Well, you're in your mess because of us so, go ahead," Tifa shrugged.
Yuffie laughed.
"Uh, but you got a problem, Tifa, you're a guy now... in girls clothes?" Barret noted.
"Um, yeah. Cloud, maybe we should go swap somewhere?" Tifa suggested.
"Bright side, Tifa, at least you're a HOT guy!" Aerith joked.
Yuffie kept laughing.
Nanaki stared at the whole scene, very much conflicted.
"...Well, I'm gonna be human either way so gender's not exactly the biggest problem," the frogified wolf-like creature sighed, grabbing a potion at random.
A few moments later, the now human female sighed.
"Guess that was female. Wait, that's clearly a seven!" Nanaki complained.
"Wow. Looks like the labels were complete crap anyway," Cid mused.
"...Soooo, what happens if someone who isn't a half-froggy lady takes one?" Yuffie wondered.
"The file says.... Ah, they catch fire. Probably not a good idea to try. You'd catch fire too, for the record," Aerith said.
The party looked at the remaining potions.
"Okay, let's just put those all away and look for Yuffie's cure," Cloud said.