Author's note: FINALLY I STARTED OFF WITH THIS FANFIC. It's been months (years in teenage timeline) since I got the idea, but lazyness kept on stopping me all the time DX

But now it's herererereeeeee! Enjoy!

Disclaimer: I don't own Phineas and Ferb. Dan Povenmire, Jeff Swampy Marsh and Disney own them.

One day, at the Flynn-Fletcher residence, Isabella Garcia-Shapiro opened the gate to the backyard and saw her neighbors Phineas and Ferb, dressed up in lab coats, wearing goggles and using their portable laboratory kit. She watched as the red headed inventor poured some red liquid into a vial filled with some blue material, changing its color to purple.

"Wat'cha doing?" Isabella asked in her cute voice.

"Oh, hi Isabella" Phineas greeted their visitor. "Ferb and I decided to create and elixir that can change things or people's color".

"That sounds cool! Can I help?"

"Of course!"

As Isabella got herself a pair of goggles and a lab coat on, Phineas noticed something was missing.

"Hey! Where's Perry?"

Meanwhile, at the "Doofenshmirtz Evil Incorporated!" , Perry was already trapped in a chair wheel. He was listening to Dr. Doofenshmirt's rambles about his horrible childhood.

"So, Perry the platypus, once I fire my brother Roger and the policemen and important people in the entire Tri-State Area with this inator right here, I will have control over the ENTIRE TRI STATE- wait a minute! I already said that phrase at the start. I don't want to sound repetitive or anything. I should really prepare my evil monologue BEFORE you come in, don't you think, Perry the platypus?"

Perry only chattered in response.

"Anyway. Where was I? Oh, right! So, once this machine takes effect on people, they will be completely defenseless against me! Even though, if you hit someone who has already been shot with my machine, another shot would make him or her back to normal. But that's the only way I personally know on how to make them back to normal, and you, Perry the platypus, will never get your hands on my ina-" Before he could continue with this rambling, Doofenshmirtz was kicked in the face by Perry the platypus.

"Aw, C'mon! Do you know how hard it was for me to modify that chair wheel to make it into a platypus sized trap!? It even cost more than the materials I used for the inator! Next time I'll use more conventional traps"

Soon, they started off with their everyday fight, stopping at the middle of the brawl to rest and have some tea and cookies.

Finally, Perry pushed Doof and made him fall over his own inator, accidentally adjusting it to its reverse mode and pressing the "go" button. Perry went over and pressed the "self destruct" bottom.

"Oh oh…" was the only thing Doof could say, as the machine started humming, throwing smoke and erupting sparks in the air. Perry ran away as fast as he could and jumped off the ceiling.

Before the machine exploded, it let out a single ray of green light, which went right into the suburbs.

Perry was getting away on his paraglide, just in time to hear the classic "Curse you, Perry the Platypuuuus!"

"So, Stacy, I was like 'Oh, no he didn't!' and he was like 'oh yes I did!'" Candace was talking with her phone inside the car.

"Candace, we're getting close to the place. You should start thinking about cutting the call" Her mom advised, as she kept driving.

"Hold on, Stacy" The orange haired girl, as she cut the phone call. "But mom! Why do I have to go to this appointment? You know I brush my teeth regularly!"

"I know, dear, but the doctor said you have to start using braces" Linda said.

"WHAIT, WHAT?! BRACES? NEVER!" Candace was starting to have a heart attack with this.

"Because, if I told you, you would have never gotten inside the car" Linda answered.

"But mom! It'll make me NOT cool with my friends"

"I'm sorry Candace, but if you want to get nice teeth, you'll have to wear them for at least a year"

"But I can't wear those- Wait a minute" Candace looked oddly around her, a serious expression on her face "bust… bust… busting sense… tingling…" She started saying.

"Wait, what?" Her mother asked, confused about her daughter's attitude.

"Mom, Phineas and Ferb are doing something bustable!" Candace suddenly shouted. "They're playing with… some sort of…" She concentrated hard. She knew she could get this "of… ELIXIRS! They're making special elixirs at home! Mom! Let's go, hurry!" Candace said.

"Wait, how can you tell?" Her mom asked, a little concerned.

"Because I can feel it in the air" Candace replied "They've been doing stuff for so long that I actually got some sort of "busting detector". I can even know what they're going to do without seeing it" Candace said.

Linda looked awkwardly at her daughter before deciding to ignore her. 'A magical elixir?' she let out a grin 'Now that's what I call imagination overload'

Phineas, Ferb and Isabella (who didn't have the lab coats and goggles anymore) where having fun with their new elixirs, having already turned the color of different things, filling the backyard with stuff such as a purple plant, a green mockingbird with brown spots, and, weird enough, a orange and blue stripped Irving.

"Yes! I'm part of the experiments of Phineas and Ferb!" He started squealing, as he looked at his new skin color.

Phineas, Ferb and Isabella looked back at him with inexpressive faces, and slowly walked away from him. They knew it best to just ignore him.

"So, the formulas have proven to be effective, don't you think?" Phineas said in his cheerful tone.

"Definitely!" Isabella exclaimed, as Ferb just gave a thumbs up. They then decided to have a little snack and started walking to the backyard entrance to the house.

Little did they know that a beam of menacing green light was advancing at full speed directly at them.

Finally, it impacted.

On Phineas.

Phineas' face became expressionless as his body started shinning bright green. He could feel a tingling sensation course thought his entire body and give him chills. Ferb and Isabella were watching in surprise and confusion at their best friend.

The red haired boy then closed his eyes and plummeted to the ground in exhaustion, as the green light engulfed him completely.

Isabella and Ferb looked at him, concerned about what just happened. But, when the light finally disappeared from the kid's system, they discovered the change Phineas has been though and they both let out a gasp out of pure shock.

muahahaha. cliffhanger. i'm evil XD