The Nowakverse is probably the most famous Fan Verse in the Chip 'n Dale Rescue Rangers fandom. It started with John Nowak's Fan FicUnder the Bridge which was followed by another two stories by the same author, Icarus and Sovereign. Several other authors at least used elements from the Nowakverse in their stories, be it only the main original character, Gadget's long lost sister Widget Hackwrench, be it Widget's self-made submarine Albacore including the entire crew, her husband, Kapitänleutnant Jürgen Jürgen, and their son, Gimcrack. Widget actually managed to build up so much of a fame of her own that no other original character from Chip 'n Dale Rescue RangersFan Fic has ever been subject of more Fan Art.
The stories in the Nowakverse contain examples of:
BFG: The Darned Nearly Recoilless Rifle is pretty huge if operated by mice. .22 rimfire cartridges might be small for humans, but for rodents they're large enough to require a big weapon which, despite Widget's efforts, isn't entirely recoilless.
Break the Cutie: Gadget. After Widget attacked the Rangers trying to kill her and turned into a permanent thread, she transforms from the kindest and most compassionate Ranger to a cold-blooded killer and plans to hunt down and kill Widget first by attacking and sinking her submarine, all hands aboard or not, her weapon of choice illegal or not. It is in fact an exaggeration of Gadget's only canonicalBerserk Button, but this time it's taken so far that some consider it Out of Character.
Circles of Hell: Tailor-made for the Rangers in Chip's afterlife dream in Under the Bridge. Monty's Circle of Hell is a gigantic fondue into which he has been dropped, Dale's Circle of Hell is a software development office in which he has to rid a GUI operating system of all bugs. Chip himself ends up in Gadget's Circle of Hell: her marriage with him.
Emoticon: Mice put an 8 in front of their emoticons in e-mails to identify themselves to their readers as mice.
Enemy Mine: Widget when she needs Rescue Rangers help in Under the Bridge.
Everyone Calls Him Barkeep: At least during the first chapters of Under the Bridge, nobody aboard Albacore knows Widget's name, not even Jürgen; they all call her "The Gray Mouse" (which refers to her gray hair). In fact, neither do readers who haven't been filled in on the story before reading it.
Kill It with Fire: Gadget's choice of a self-defense weapon against Widget is a disposable lighter, modified so that she can hold and operate it horizontally and use it as a flamethrower.
Long Lost Relative: Gadget didn't even know she has a sister until Widget showed up. On a similar note, neither did Widget for quite a long time.
Love Triangle: Gidget, Bertie and David in Under the Bridge. Who they are doesn't matter because David is only mentioned by name, and Gidget and Bertie are mere decoration for the cruise ship Minuscule which is sunk by the Albacore a few paragraphs later.
Mistaken Identity: Two-way. Gadget and Widget have a mail conversation in Under the Bridge. However, neither does Widget know that her opposite is the very same sister she wants to kill, nor does Gadget know that her opposite is her sister (or that she has a sister at all), let alone that said sister is out to kill her.
MST: Under the Bridge was MSTed by Nowak himself, along with a coauthor.
Mythology Gag: Before she first encounters the Rangers, Widget lets off her anger on Gadget dolls made by Applause, known among Rangerphiles as "Gadget plushies" and for being outrageously expensive nowadays. The only hints at their identity are their make, their size, and that Jürgen asks Widget if they should travel to Orlandonote as in Walt Disney World to get more.
Old Shame: John Nowak has since described himself as "someone who should never have written Rescue Rangers stories", and this series is a punchline in his MST works.
Purple Prose: The third chapter of Under the Bridge starts out with this in the short scene with Bertie and Gidget aboard the R.M.S. Minuscule. It ends when the story cuts to aboard the Albacore which prepares for an attack on the Minuscule.
Red Right Hand: Widget's mechanical left arm which she hides under a black cloak and in a black glove.
Repetitive Name: Kapitänleutnant Jürgen. His family name is Jürgen, his first name is Jürgen, and his middle name happens to be Jürgen, too.
Revenge Before Reason: Two-fold, even. Widget built a sophisticated attack submarine, hired a crew for it and even sinks a rodent ferryboat just to exact revenge on her sister Gadget. Gadget, in turn, after finding out that Widget is out to kill her, builds a torpedo out of an illegally imported Russian machine gun round to sink Widget's submarine with everyone aboard.
Self-Deprecation: In the aformentioned MSTing, (which, remember, Nowak himself co-wrote) Mike & the Bots frequently poke fun at the story's dark tone and the overuse of Technobabble. Later, Nowak shows up and depicts himself as a guy who always over analyzes things.
Kapitänleutnant Jürgen could be one to Das Boot. He is even addressed as "Herr Kaleun" like Jürgen Prochnow's character.
Although not explicitly mentioned, Albacore is one to the Nautilus (although the latter's Disney live-action version has a full-blown Cameo in the Chip 'n Dale Rescue Rangers episode "A Creep in the Deep").
Large saw blades ran from bow to the top of the forward part of the bridge, and along the sides and bottom of the bow. The blades would cut fishnet and gave the black vessel a strangely familiar appearance.
Technology Porn: John Nowak managed to describe the contraptions in his stories at such a high level of detail that it's almost possible to rebuild them in Real Life unless the Rule of Cool is involved.
There Is No Kill Like Overkill: The Darned Nearly Recoilless Rifles designed by Widget. .22 Rimfire might be small for humans, but they are described in Under the Bridge as the rodent equivalent of 150mm artillery. Nevertheless, they were conceived and are used mostly as anti-personnel rifles.
Also in Under the Bridge, Gadget herself builds a magnetic homing torpedo out of an illegaly imported Soviet 14.5×114 anti-tank machine gun round to sink her sister's submarine.
Those Wacky Nazis: Averted. Using a surprisingly subtle bit of character reference, Nowak makes it clear Jurgen wasn't one.
You Keep Using That Word: "Pelagic" means an open zone in the deep ocean. It has nothing to do with cats. Given that Nowak cowrote the MST of Under the Bridge, presumably he looked up what the word meant at some point after writing the story, because the MST beats him up heavily for misusing the word.