In reality, it worked for about a week. Phineas and Isabella skipped around, calling each other 'Phinny' and 'Izzy', shedding sparkles and pink hearts and generally annoying the crap out of everyone who'd ever thought they'd be good together.
Only Ferb knew why Phineas was acting like this, but he had actually been 'busted' by Candace. Apparently the mysterious force only worked when there was two of them. Don't worry, he was only confined to his room. For a month.
In the meantime, Isabella was getting... Well, bored. She had thought Phineas liking her back wouldn't mean that he stopped building things. Shedding sparkles had been fun for a while, but quickly lost its entertainment value. Plus, all the skipping was making her legs hurt.
"Phinny, what happened to 'carpe diem'?" she asked, beginning to feel a little uncertain.
"Izzy, my sweet!" 'Phinny' breathed. "Who could care about some silly Spanish when they're looking at the most beautiful girl in any dimension you care to name!"
"Thanks for the compliment, Phinn-eas. But... " Isabella was hesitant.
"Yes, my dear heart?" Phineas pretty much twittered.
"Well, firstly, carpe diem is Latin. There's a big difference!" She was desperate for Phineas to care about this. It would mean he was still the Phineas she loved. If he didn't, then he would just be some random creepy guy who looked like Phineas and loved her at a scary level.
"Latin, Spanish, African! Izzy, my heart's desire! You can speak any language you please! Though, ma cherie, my favorite is French! J'adore, mi amor!" Phineas exclaimed.
"Mi amor is Spanish,"-Isabella approached Phineas, looking angrier by the moment-"and YOU'RE! NOT! PHINEAS!" she finished, punctuating each word with a slap. Surprisingly, Phineas didn't react. At all. Well, he did proclaim his undying love for Isabella for the 5,780,000,932,659,019th time. But that was normal now. Isabella's eye twitched; she luckily managed to contain her temper.
Taking a deep breath, she began to speak. "Phineas, I need to go away for ten minutes. I'll come right back, OK?"
"My pet, whyever would you leave me?" Phineas gasped.
"I need to go to the bathroom," Isabella stated truthfully.
"Well, my dove, I will accompany you to the door of the bathroom. Then I will wait outside for your GLORIOUS RETURN, darling! But do not stay too long, or I shall have to storm the bathroom and rescue you!" Phineas was determined not to let Isabella out of his sight.
OK, I'm a little freaked out now, Isabella thought. "OK, Phineas." I should be able to fix this in there, as long as no one else is using it, she figured.
So they skipped off to the random public bathroom that had magically appeared. Rather, Phineas skipped and dragged Isabella behind. As soon as they reached it, Isabella threw herself inside.
"Fairygodfish!" she yelled. Luckily, the walls of the bathroom were soundproofed for no apparent reason, so Phineas didn't come barging in.
In a now familiar poof of smoke, Floyd appeared. "I do have a name, you know," he grumbled.
"I'll ask you later, right now I'm in the middle of a crisis!" Isabella bit her lip, a pained expression on her face.
"So our little heroine has pricked her thumb on those roses she was skipping in, hasn't she?" Floyd asked smugly.
"Say what?" asked Isabella.
"Metaphors," sighed Floyd, "why does nobody get them?"
"Sorry, I'm just really distracted right now!" worried Isabella.
Floyd pulled a face-as well as a goldfish could. "Yeah, I know. I also know what you're going to ask, and I can't."
"I haven't even asked yet!" Isabella cried.
"You want me to reverse your wish because Phineas doesn't seem like the real Phineas." Floyd barely refrained from rolling his eyes.
Isabella blinked. "Am I really that obvious? Why can't you reverse it?:
"Yes, yes you are. I can't because it's a law!" Floyd shrugged.
"This is going to sound really spoiled, but I NEED you to reverse it! Why is that even a law, anyways?" Isabella argued.
"I don't know. But I DO know that if I try to break it, not only will it not work, but I will lose all power as a fairygodfish."