Hey now, you may have guessed some things that are gonna happen in this. But some things are just inevitable! I have lots of fun writing these Doof and Perry stories! It's always fun to watch them, and also to write about them! Also, I know this is a shorter chapter. But hey, you can't always make billion word chapters can you? I thought so. Please enjoy!

Perry stood over Doof who was laying on his back. A little smirk crossed his face.

"Ha ha, I get it. I deserved it." Doof said as he tried to get up. He swung a tiny fist at the guineapus. Perry then grabbed Doof's arm and stopped him, he flung the Guineashmirtz across the room… or as far as he could be thrown as a guinea pig.

The tiny doctor stood up and looked over to where Perry was standing. The agent stood there with a smile across his face, that almost looked like he was about to laugh. Dr D charged for Perry the Guineapus once more. As he did this he started to slip. He wasn't very used to running on guinea pig legs. Perry was standing directly in front of the tripping Guineashmirtz. Only moments later, they crashed before the agent could jump out of the way of the clumsy scientist.

Agent P was sandwiched under the doctor. He threw the Guineashmirtz off of him. Dr D landed near the Guinea Pig-inator, as it lay there untouched. He got up and ran over to the discarded -inator. Just as he got there, he was hit in the back once again by Perry.

The Guineashmirtz was thrown onto the side of the -inator and hit a red button on the side. The small machine exploded, leaving no part behind.

"NOOOOO!" the doctor shouted. "Of all the times for one of my -inators to be destroyed!" he turned and glared at Perry the Guineapus.

"Don't you realize that we can't change back now?! Now BOTH of us are stuck as guinea pigs!" Perry looked back at him with a look that said he was sorry and shrugged. He didn't actually mean for the man, or, well, Guineashmirtz, to hit the self destruct. Now they really were stuck!

Perry then stood there and thought for a moment. He turned to Doof who was laying flat on his back now, as if he had given up. Perry walked up to Doofenshmirtz and chattered. At that moment, Doof's head shot up and he looked straight at Perry.

"Wait a second! How come you still make that sound? You're a guinea pig now! Well, I guess I still talk too now don't I… Still, I don't care what you have to say! I still can't understand you anyways." he said as he shut his eyes with an angry frown and put his head back down.

Perry stood there looking at the pathetic evil scientist. An thought came to his mind.

Perry ran over to the cage where his hat still sat. He climbed inside and walked up to the fedora. Reaching inside the hat, he pulled out a pencil and pad of paper. The objects were very large and awkward since he was so small now, but he managed to write something out on it.

A little hand tapped the bummed out scientist. He sighed and looked up to see Perry the Guineapus holding up and pointing to a piece of paper.

"You want me to make a Reverse Guinea Pig-inator? That's a bit of a cheap attempt don't you think, Perry the Plat- I mean Guineapus?" he sat up as he said this. It was worth a shot.

"How exactly do you expect me to do this when I'm not even a foot tall?" he questioned the agent. In response to this, Perry gestured to himself and then Doof, meaning to work together.

"You want us to work together?" Doof thought for a moment, "Well, we do make a pretty good team!" he smiled at Perry, who set the paper down and smiled back. He helped Doofenshmirtz up to his tiny feet.

The two got to work on another -inator. Perry gathered the materials they needed as Doof wrote out the blueprints. After a short montage, they had all that they needed to put the device together.

"Ok… Well that went well!" Doof said happily. Perry just rolled his eyes, wanting to get started on building the machine. It was going to be quite small, due to them being so tiny.

They got started on the -inator. Some parts were hard to put together due to them not having the right sized power tools, but they managed with their little hands. Eventually, the thing was finished.

"Ha Ha! We did it!" Doof shouted in triumph. Perry smiled, it didn't take TOO long for them to pull this off, and he had to agree with the doctor that they did in fact make a pretty good team… when they worked for the same cause.

Doofenshmirtz walked over to the Reverse guinea Pig-inator to activate it, but as soon as he did, the thing just shorted out and stopped working. The agent looked closer at the machine. There was a small detail that he did not recall building into the -inator. In fact, he had scratched it out of the blueprint in the first place. a small red button sat on the -inator's side. The guineapus face palmed himself, then pointed to the red button.

"Huh? What is it?" the scientist asked as he turned to look to where the teal guinea pig was pointing. He noticed the self destruct button.

"Ohhhh… What's the problem? That can't be what's causing the problem!" he asked, defending his tradition. Perry walked up to where the button was, looked at Doof and raised an eyebrow.

"Ok, well, maybe it could be the problem… but how would you know?"

Perry rolled his eyes. It wasn't the doctor's fault that Doof had made the same mistake again. He had once more, wired everything through the self destruct button. Of course, the Guineashmirtz would not have remembered having done that before… in fact, the guineapus was the only one that DID remember that. He took the button and rewired the machine without it. As he pushed the button, the machine began to work. A purple beam hit both of the guinea pigs.

Only a moment later, Perry looked down at himself and saw that it had worked. He was now a platypus again, and it was good to be one. Doofenshmirtz was once again his own self, lab coat and all. The platypus walked over to the cage where he had previously been trapped, he reached in and grabbed his hat. Putting it back on his head, he looked over at the evil scientist once more. A smirk crossed his face and he walked over to the tiny -inator. He kicked it aside and the machine broke into a bunch of tiny pieces. He turned and grinned at Doofenshmirtz before he left the building.

"Oh, I see. Your just gonna smash the -inator that WE worked on TOGETHER? Thats real mature Perry the Platypus! Real mature! Ugh…" He stood there as he came to realize that he would not get a response from the platypus that had already left. He then shouted as loud as he could, "CURSE YOU PERRY THE PLATYPUS!"

Back at home, the boys had cleaned up their work in the back yard. It was odd to see them clean up their own things, seems how it was usually done by one of Dr D's -inators before it blew up. The boys turned and saw him standing there.

"Oh, there you are Perry!" Phineas stated in excitement. "You missed the movie! It was great! If you had been here, we could have put you in it. A platypus would have made it even better!" the boy said as he turned to his stepbrother Ferb.

"Yes, a platypus would have made it the best. Platypuses are by FAR the best animals, especially in movies." Ferb responded as he bent over and started to pat Perry on the top of his head. Phineas joined him in petting their platypus.

The British boy was right. Platypuses were the best. Perry was glad to be a platypus, and no other animal.

Alright, I thought it would be cute to state what I think the boys feel (it is also how I feel, I have liked and known of these crazy creatures even before I knew of this show!) about platypuses… or platypi… being the best animals. They certainly are VERY interesting! Perry likes being a platypus. I mean, I don't think he likes to be anything else… kinda like when he switched brains with Candace, and he seemed kinda upset, like how he didn't have a tail anymore. lol Anywho, thanks for reading and I hoped that you all liked it! If you have any ideas for me or want me to continue with something you saw or whatever in this story, please tell me! :P Please review! :D :D :D