This is one of my first stories so please review and tell me what you think about it. I don't own anything here. It is set when Phineas, Ferb and Isabella are all 20 and have moved from home and Lawrence and Linda have moved to Portugal leaving Perry by himself. Doofenshmirtz is about 46 and Carl is 25 but is still working as an intern for Major Monogram. I hope you enjoy it:

Rouge Platypus

Chapter 1: Purring Platypus

Perry woke up to the sound of a screaming alarm meaning there was a fire which set him immedietly into action. He jumped up from his pile of soft things where he slept and grabbed his favourite possesion from the post in the corner before placeing it on his head - his secret agent feodora. The Platypus was one of the best agents that O.W.C.A had in the Danville area so whenever there was an emergency there he was needed to help sort out the problem ao he quickly sprinted down the corridors dodging other agents who were evacuating to get to Major Monograms office. Once he arrived there Perry quickly knocked and went in before smartly saluting to his boss who was standing there.
"Ah Agent P" Began Monogram, "You are the only top agent in today so we need you to make sure nobody left in the building and the are all outside"
Perry rolled his eyes and gave Monogram a stare that ment 'why am I always the only one in?'
"Yes yes you can stop looking like that and you will also get some bonus money for always doing the emergency missions"
Perry shugged his shoulders showing that he didn't really care and then he saluted to show that he was just happy to help.
"And we are glad to have you in The Agency Agent P" Monogram confessed before whispering to himself, "I think we have Agent P sussed when it comes to understanding his signs"
Perry had heard that remark thanks to his good hearing which was alot better than a normal platypus's but he just ignored it and just went off to do his job.

3 hours later Perry had saved 2 agents from going up in flames and an evil scientist who was in for questioning and he thought to himself about how he could never imagine Heinz Doofenshmirtz (his nemesis) being questioned at HQ.

Perry spent the rest of the day doing more missions and only could go back to sleep in his room when he finished which was at 9pm. At about 9:30pm Perry suddenly heard his watch beep and woke up reluctantly knowing this meant he had to go and see Monogram so he quickly stretched .
"Congratualtions Agent P you have saved lives once again and we have also got news that Doofenshmirtz has made new inator of somekind so we are all conting on you to stop him from wreaking havoc with it all over the Tri-state area!"
Perry ran back to his room, jumped into a chute which sent him into a kind of garage where he stored his veichels and set off towards DEI on his scooter.

Catiously he opened the door to Doofenshmirtz's room using the key he had been given to save having to pay for either a broken window or door and he stepped into the room expecting a trap to go off. He scanned the room looking for something evil until he found a box that had a note on it which said: To Perry the Platypus. Afraid it was a trap he walked back away from the box before throwing a placemat from the table at it and as he suspected there was an explosion sending sticky glue flying towards the placemat and eventually sticking it to the wall. In the place where the box used to be there was a contraption with the words Shrinkinator written on the side of it and knowing this device would only be used for evil Perry picked it up, opened a nearby window and chucked it out hearing a satifying smash as he closed the window. He was just about go out the fire exit and parachute back down to his scooter when he heard a door being opened and out of it came a man wearing a lab coat that instantly was recognisable as Doofenshmirtz.

Doofenshmirtz looked at Perry and then pointed at the space where the Shrinkinator used to be and said "Well it was rude of you not to tell me you were in I was only in the other room. Oh and have you seen a strange purple object here I left it on the floor at this spot here" Perry shook his head and smiled sweetly whilst trying to look innocent. Then Doofenshmirtz saw the mess on the wall and shouted "RAAHHH you let yourself in without telling me and THEN you destroyed my Shrinkinator without listening to my backstory! You really know how to make a person annoyed Perry the Platypus! Ok I didn't want to do this but this time you've really done it!" Grabbing his sticky gun from under the sofa he aimed at the platypus and fired 3 lots of gloop but Perry expertly dodged them with ease "Caaaaaa!" He chattered as if to say you need some lessons. This annoyed Doofenshmirtz who fired more gloop at him each one missing its target as Perry somersaulted out of the way. Springing up high into the air Perry kicked Doofenshmirtz in the chest making him fall onto his back and lose his gun as it went flying into the corner. A second after this had happened Perry landed on his nemesis's stomach and was about to knock him out with a final punch with what little energy he had left after dodging the gloopballs when Doofenshmirtz tried to grab him and chuck him back but somehow ended up running his hand down Perrys back once in a strocking motion and was about to grab his tail when Perry let out a purring noise and relaxed before realizing what he had done so he lept back from Doofenshmirtz, landed but then blacked out from total exhustion.