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Fan Fic: The Stepbrother Sitch
The Stepbrother Sitch is a Kim Possible & Phineas and Ferb Crossover written by Owennumber1fan. The plot is pretty straightforward: Kim hears that Drakken is up to no good in Danville and heads out there with Ron & Rufus to stop him. However, a blown out tire on the Sloth causes them to stop for help at a familiar house; Hilarity Ensues.

The story proved to be popular enough that the author wrote a sequel Fan-tastic Voyage. In this one, Phineas, Ferb & Candace come to Middleton to pay Kim a visit; the teen hero must deal with Drakken & Doofenshmirtz's newest plan, as well as contend with Candace acting like a crazy fangirl.

Those two stories were followed by The Life of Riley a Kim Possible & The Replacements Crossover set a few days after the aforementioned story, where Kim visits Pleasant Hills and discovers one of her old foes has a connection to Agent K; Kim Goes Hawaiian in which Kim & Ron decide to go on vacation following the events of the last two stories, and meet up with Lilo & Stitch (this story occurs after the events of the crossover episode from the original series). And Phineas & Ferb's Excellent Adventure in which the Darings' travel to Danville to accept an award for Riley; K is revealed to have a past with Linda, and an old enemy is up to no good.

After an absence of several years, the author returned with a new story, Double the Fist, Double the Trouble, a crossover with Kim Possible & Randy Cunningham: 9th Grade Ninja.

These fanfictions contain examples of:

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     The Stepbrother Sitch 
  • Affectionate Parody: Phineas gets the inspiration for his big idea after watching Priest.
  • Big Bad Duumvirate: Dr. Drakken & Dr. Doofenshmirtz, natch
  • Captain Obvious: When Monogram sees Rufus in Perry's lair, he asks Carl who he is, Carl replies that he appears to be a naked mole rat.
  • Continuity Nod: Shego & Vanessa discuss several old plans of both Drakken & Doof's from several episodes to prove which of them has the stupider ideas.
  • Free-Range Children: Phineas, Ferb, & Isabella pretty much just walk down to Doofenshmirtz Evil Incorporated with no one noticing. Justified in that Candace wasn't really paying attention.
  • Incredibly Lame Pun: Most of the titles of the stories, as well as the respective chapters.
  • Innocent Innuendo: Kim & Ron's actions at the beginning.
  • Insistent Terminology: During the story, Shego grabs Isabella and threatens to "fry the Girl Scout" unless Kim & Ron surrender. Isabella then angrily reminds her captor that she's a Fireside Girl, not a Girl Scout.
  • Lampshade Hanging: Frequently, given both shows involved.
  • Never Live It Down: In-universe, Drakken's "mind control shampoo" plan; Vanessa admits it's dumber than any plan of her dad's and Drakken is quite embarrassed when Shego brings it up.
  • Not So Different: The main reason Doof & Drakken are working together in the first place. Also, Candace feels this way about herself and Kim after a while.
  • Oh, Crap: Candace realizing that the Sloth, (which she "borrowed") is now driving itself back to her house.
  • Reality Ensues: If you put a naked mole rat in straps meant for a human, of course they'll slip out. Doof himself lampshades this when it does.
  • Verbal Backspace: As they're escaping from the cage, Isabella tells Phineas that "if we don't get out of this, I just want to say... I love you." Phineas doesn't hear her due to picking the lock, and when he asks what she said, she replies with "I love glue."
  • Would Hurt a Child: Shego has no problem frying Isabella if Kim doesn't surrender.

     Fan-tastic Voyage 
  • Author Appeal: Kim & Candace find themselves tied up prisoners of the two doctors.
  • Big Bad Duumvirate: Drakken & Doof, yet again.
  • Borrowed Catchphrase: At the end, both Doof & Drakken use each other's catchphrases, and find it really fun to do so.
  • Brainwashed and Crazy: Perry ends up like this, compliments of the two docs.
  • Curb-Stomp Battle: Kim vs. Perry Perry wins the first time, and nearly beats her the second time until his brainwashing is undone.
  • Good Angel, Bad Angel: Candace sports these when deciding whether to break into Kim's closet; even her angel suggests she should.
  • I'm Standing Right Here: As Candance badmouths her brothers over the phone, Phineas comments that he can hear everything she's saying.
  • Let Us Never Speak of This Again: Kim says pretty much those exact words to Ron after she gets beaten by the brainwashed Perry.
  • Loony Fan: Candace comes off as one of these, even going so far as to buy clothes that look exactly like Kim's.
  • Moment Killer: Candace provides one for Kim & Ron.
  • Portmanteau Couple Name: Ron attempts to come up with one for him and Kim, but finds neither "Rim" or "Poppable" to be all that great.
  • "The Reason You Suck" Speech: Kim gives one to Candace after getting fed up with her actions, basically telling her to quit copying her and get her own life.
  • Strange Minds Think Alike: During the story, Kim, Ron & Candace are shown watching Ballroom with the B-List and commenting on it. Moments later, Doof & Drakken are shown doing the same.
  • Suspiciously Specific Denial: Isabella did most certainly not lose Perry and he is definitely in her house and not lost.
  • Talk to the Fist: Perry delivers this to Doof at the end.
  • What Happened To The Sidekick?: Shego disappears near the end of the story (although Drakken said she was taking her vacation). The real reason is because the author figured she'd easily defeat Kim and supersuit-enhanced Candace and wanted to give them a fair fight.
  • Would Hurt a Child: Drakken's henchmen, and Drakken himself, eventually.

     The Life of Riley 
  • Amusing Injuries: Shelton gets this when he re-activates Dementor's time bomb
  • Big Bad: Professor Dementor
  • Bound and Gagged: Kim & Agent K at the hands of Dementor, as seems to be the case in many of this author's works.
  • Busman's Holiday: Weirdness just seems to follow Kim everywhere.
  • Brainwashed and Crazy: Riley at the hands of Dementor and Henchco's newest device, a brainwashing helmet.
  • Deus ex Machina: The fact that the HenchCo brainwashing helmets can be undone with The Power of Love although it can fall under Rule of Funny.
  • Does Not Understand Sarcasm: Both Dick & Ron experience this at different points.
  • The Dragon: Myron, Dementor's dumbkopf brother in-law
  • Funetik Aksent: Dementor is written with one of these.
  • "I Know You're in There Somewhere" Fight: Kim tries this on the brainwashed Riley but gets a punch in the gut for her troubles.
  • I'm Standing Right Here: Riley says these exact words after Todd tells Rufus he'd love to see her reaction if he put him in her sock drawer.
  • Like a Weasel: Todd initially says he hates Kim, only to become a massive fanboy when she actually arrives.
  • Mama Wolf: Agent K threatens Professor Dementor when he reveals his plans for Riley, promising, among other things, that there won't be enough for an autopsy when she's done with him.
  • Overly Narrow Superlative: "You're the best mother in the history of mothering."
  • The Power of Love: Agent K uses this in to break the brainwashing on Riley.
  • Revenge by Proxy: Dementor's plan- he plans to exact his revenge on Agent K by brainwashing her daughter into believing he's her father.
  • Running Gag: When Riley sarcastically tells Dick that Kim is a crimefighter/pop star, he keeps making references to said career throughout the story.
  • Shout-Out: After meeting CAR, Ron comments that he's like that talking car on that show and asks him to say "I've got a bad feeling about this Michael."
  • Tempting Fate: A Manatee Gag shows the developments of one of Henchco's newest weapons a brainwashing helmet with one of the developers telling Jack Hench it works perfectly... although extreme feelings of love from a relative are strong enough to disable its' effects. Hench figures the odds of that happening are rare, and orders the product shipped as is.
    • Kim saying that none of her enemies could possibly show up for a little autograph signing.

     Kim Goes Hawaiian 
  • Arbitrary Skepticism: Despite having actually seen aliens, Drakken finds the notion of alien experiments to be unbelievable.
  • Berserk Button: Alien experiments or not, you turn Ron into a bug and Kim will not hesitate to take you out.
  • Big Bad Duumvirate: Professor Dementor & Dr. Hamsterviel.
  • Brainwashed and Crazy: All of Stitch's cousins (save Ace) are turned back into their evil selves thanks to Hamsterviel & Dementor.
  • Buffy Speak: Actually not Kim or Ron but Hamsterviel uses this.
  • Busman's Holiday: Even on vacation, Kim can't seem to avoid fighting evil.
  • Call Back: In the previous story, Kim told Ron she didn't want him eating Bueno Nacho in the car because it was hard to clean out. In this story, she lets him have a chimerito, because, since they're going on vacation, she can relax the rules a little.
    • When Kim finds Drakken on the island, she mentions she's there to get a vacation from her last two adventures, including his "Take Over the World through the Internet" scheme from "Fan-tastic Voyage."
  • Co-Dragons: Myron for Dementor and the Leroys for Hamsterviel
  • Conservation of Ninjutsu: Averted, the Leroy's often attack Stitch en masse.
  • Curb-Stomp Battle: Ace, the only not-evil of Jumba's experiments (and therefore, immune to Hamsterviel's beam) easily defeats a handful of the rogue experiments until Shortstuff manages to backhand him.
    • Also, even with Drakken & Shego's help, the heroes don't fare so well either.
  • Egopolis: Dementor plans to rename the taken over island "Dementoria" until Hamsterviel convinces him to come up with something with both of their names.
  • Enemy Mine: Kim is forced to team with Drakken & Shego, who were taking a vacation on the island, to stop the rogue aliens. Naturally, Kim & Shego aren't too happy about that.
  • Funetik Aksent: Dementor again has one, but not Hamsterviel, so as to not make it confusing.
  • Forceful Kiss / "Shut Up" Kiss: Kim gives Ron a combo of both of these near the end after he won't stop babbling.
  • Hoist By Their Own Petard: Jumba comments how it's ironic that Hamsterviel & Dementor are defeated by the very experiments they intended to use to conquer the island.
  • I Have to Go Iron My Dog: Ron gets out of eating Pleakley's pancakes by saying "Me and Rufus have...some stuff to do."
  • Insistent Terminology: The Leroys are not Hamsterviel's pets, they are his "henchmen."
  • Lethal Chef: Pleakly, as per usual; when making pancakes for breakfast, he said that he didn't have all the ingredients but he "used some substitutions."
  • Name's the Same: Drakken's "Stun Gun" because he couldn't think up a better one.
  • Nice Job Breaking It Heroine: If Kim had stayed around to ensure that the authorities picked up Dementor, or even went after him, he wouldn't have escaped and hooked up with Hamsterviel.
  • Noodle Incident: What happened when Ron tried surfing; Word of God is that the author was originally going to write that scene, but then decided it would be funnier if it was left to the reader's imagination.
    • Also, how Ron knows that nacho cheese & puke are hard to clean.
    • Whatever Lilo & Stitch did that Jumba won't allow them to use his inventions anymore. They assumed a heat ray would generate heat and were just trying to warm up.
  • Police Are Useless: Dementor mentions he's no longer in jail because the jail in Pleasant Hills was "run by incompetents"; Wade later learns that the reason he didn't know Dementor was out was because they were so embarrassed he escaped, they lied and said he was still there.
  • Post-Kiss Catatonia: The result of the Forceful Kiss mentioned above.
  • Right Behind Me: While waiting for Kim, Ron tells Lilo that she takes forever to get ready and that you never see pictures of her in the morning "because they are not flattering"; he then learns that Kim heard everything he said from the doorway.
  • Screw This, I'm Outta Here!: After Myron watches Stitch battle the Leroys, he decides its best to just leave.
  • Shout-Out: After Kim tells Wade that Dementor was planning to block out the sun, Wade questions "didn't an old guy from a TV show try the same thing?".
    • When Ron is talking about his bad surfing experience, he comments that he got a starfish in his swimsuit and they're not all silly and funny like on TV.
    • "This isn't good, this is super bad! Unlike [[{{=Superbad=}} the movie]], which was super good!"
  • Teeth-Clenched Teamwork: Kim & Shego, of course
  • Villains Out Shopping: Turns out Drakken & Shego scheduled their vacation at the same time and in the same place as Kim.

     Phineas & Ferb's Excellent Adventure 

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