Chapter 1 is Summary Chapter, since the Summary section here is way too small to give you a summary for the story.

Mario and the Nintendo Characters

It was a simple job for Mario and Luigi to take a look at a broken Warp Pipe. Where it leads them to, it's to a Quirky world of Heroes.

Darkseid invades the Nintendo Franchise. Darkseid discovers an entirely new Multiverse outside of the one he's used to. A whole new existence out there that is separate from his reality. It's the Multiverse of Nintendo. Darkseid, wanting to conquer and enslave, decides to go and take it over., beginning his newfound conquest. Now, all of Nintendo face their greatest threat ever.

An amnesiac Shadow the Hedgehog finds himself in a universe far beyond home. As he struggles to piece together his last, will the Ultimate Lifeform rise to the challenge or will Bowser conquer the cosmos?

A year after the great war with Bowser, peace has returned—but it's short-lived. When Dr. Robotnik resurfaces with a deadly new plan, Princess Peach and her allies must race to secure the powerful Chaos Emeralds before he harnesses their power and undoes everything they fought to rebuild. With friendships tested and old enemies rising, the fate of their worlds hangs in the balance.

The Cookie Nations were ruined when the Soul Jams were stolen, and it's the first Gingerbrave had heard of them. Of course, now it's his, Strawberry, Wizard, Custard III, and Chili Pepper Cookie's responsibility to deal with the new invasion coming.

Mario and Sonic at the Sochi 2014 Winter Olympic Games have to compete to see who will be the 'Preview Couple' for the Figure Skating Pairs event! Mario and Peach decide to enter, but Sonic isn't quite used to skating with Amy... How will she help him to form a beautiful piece to wipe out the competition? (Sonamy) CONTAINS: Cute feels!

After Jack woke up from a very serious nightmare about the Dark Spirit, Jazz and Danny has to invesigate to find out who haunted everyone in Amity Park in their dreams.

Sequel to 'The Incredible Crossover Race 2' We have ourselves 23 different team that will embark on another race around the world and through different universe for an epic prize of not one million but THREE dollars. In this all-star season, newbie teams and veterans will compete and yet a new host will take this race to epic adventure for the 3 million dollar prize. Who will win?

(Sequel to My Little Paper Mario) Another adventure in the Mushroom Kingdom, though in a new land with new foes, and even scarier dangers than anything in both this world and Equestria combined. (Permission was given by Codex92 (the original author, so all credit goes to him) to post this)

Captain Toad farts his way into the world of Genshin Impact where the inhabitants take kindly to the Craptain; indeed it's easy to see how the Braptain will get along with them: the more curious thing is to see how it unfolds!

Captain Toad farts his way into Smash to find several gassy challenges to his treasure tracking tooter!

(Inspired by The Crimson Yinglet stories) After a conflict that caused the Power Stars to be transported to other universes, it is up to Mario, Luigi and his friends to find them. New friends and foes will come, but they all will learn a very important lesson: These plumbers are NOT like the others! Arc 1: One Piece

Now on a brand-new tour with Vel and Ven, Cobblestone thought his life was going great. But then disaster strikes and he looses what's left of his voice. Now being scouted by "eye-for-talent" Sour Bunch leader, Grape, he has to make a decision. Does he value his friendships, or the love of fame? (Spoiler warning in prologue, TW in A/N for chapter 1!)

Captain Toad ends up farting in the methane making world of Touhou.

Ridley and his friends are back for another adventure! This time, the ex-space pirate, Luigi, Roshi and Samus find themselves trapped in a dream world under the tyrannical rule of the nefarious Wart and his gang. What trials await our unlikely heroes and will they be able to stop Wart's plans to invade the waking world? Read and see.

Mario's on an all-new epic quest! Join him, Luigi, Peach and Yoshi as they enter a brand new anime dimension to stop the mysterious glitchy entity known as Phantom, and save Bowser from the clutches of overwhelming power!

Bowser couldn’t find another evil scheme! While he was pondering the Koopalings stumbled upon a weird TV. However the TV was magical and it teleported them all to a different world that had antics and mayhem. Could our heroes in their home world repel these invaders?

Captain Toad farting his way through the various facets of life.

Captain Toad farts his way into Conker's bad fur day with the latter not exactly happy to see such a stinker.

Olly and Grape fit the description of objects perfectly: an inanimate being with a soul and a face. However, they get pulled into an object show and their only hope of escape lies within the puzzling hands of their host, Pizzaz.

Mario and Luigi are on a multiversal adventure to find the missing power stars. Will their actions have dramatic changes to these worlds and will it have unforeseen consequences. Only time will tell.

Angry Mario is recovering from a battle when he runs into the cowardly Angry Luigi they soon team up to defeat a common enemy.

This was written out of boredom