Title: Crisis War Across Dimensions!

Main characters: The Mane Six, Spike, Tirek.

Genre: Crossover, Comedy, Adventure, Alternete Universe.

Crossover With:

Cartoon Network:
Dexter's Laboratory
Ed, Edd, & Eddy
The Powerpuff Girls
Samurai Jack
Ben 10: Omniverse

Nickelodeon:
Danny Phantom
The Fairly Oddparents
My Life as a Teenage Robot
Crash Nebula
The Modifyers

Note: This story shares the same universe as a "Double Rainboom", yet takes place sometime after Season 4(and Rainbow Rocks).

Premise:
When Rainbow Dash pulled off of the "Double Rainboom", she had no idea that when she broke through the boundaries of her own dimension, she ended up causing a distortion within the boundaries between other dimensions as well...

This distortion catches the attention of Aku, the shapeshifting master of darkness, who proceeds to use it to his advantage and look into other dimensions, upon seeing so many powerful heroes across the dimensions, he then proceeds to recruit several villain from their respective worlds, including:

Tirek
Vilgax
Mojo Jojo
Mandark
Baron Vain
Dark Danny
Queen Vexus
Dark Laser

Together they create the League of Extraordinary Villains: A group composed of several malevolent miscreants set on conquering the Multiverse. Together they then proceed to build a large army of robot and Demons to invade and concour multiple worlds!

When their evil forces begin showing up in Ponyville, Twilight and her friends just barely fight them off and discover that they're invading from another dimensions is being threatained! With no time to waist. The weilders head into the portal to stop the invading forces. Upon entering however they are seperated by another attack and end up being thrown into different portals, Twilight, Spike, Pinkie Pie, and Fluttershy are thrown into one while Rainbow Dash, Applejack, and Rarity get thrown into another. They end up fleeing through alternete worlds and meet up with several heroes from the other world's.

Twilight, Spike, Pinkie Pie, and Fluttershy encounter a stoic warrior named Jack, a kid hero known as Ben 10, the mad scientist Dexter, a fearsome trio of lab experiments called the Powet Puff Girls, and…some kids from a cul-de-sac(Ed, Edd and Eddy, who were warped there by mistake).

Rainbow Dash, Applejack, and Rarity run into a kid hero with ghost powers named Danny Phantom, a robot based off a teenage girl named XJ-9(Jenny), a boy with a power suit called Crash Nebula, a special agent known as Agent Xero, and... a little boy and his fairy godparents??

Realizing that not just their worlds, but all other worlds are in danger, it's up to all these fearless heroes to band together, defeat their archenemy's, and put an end to the League's nefarious plot of inter-dimensional conquest!

3854582 Danny Phantom and Crash Nebula have the same voice actor.

3854582
Wow, I am so thrilled for a cluster fuck crossover of who-cares-how-many franchises, with poor story, poor grammar
and an author without a beta-reader, or who relies too much on the beta-reader without checking by himself.
Seriously, why not pick only TWO franchises, so that you have a better overview of the situation?
I have never seen such a fanfic turn out good.

3854582
Never mind my criticism, you should ignore it,
I have just actually read the whole thing.

It sucks.

3854582 I may want to read it, mainly because I've read Crisis on Infinite Equestrias, and I wouldn't mind seeing your way of doing this story. Is it going to be anything like The Long Earth, or will it be something different?

3854582 What would you think of a Nickelodeon shared universe?

3854695 Do you live for... nothing else than just to point out the flaws of a story idea someone has? Also there's a reason why the idea is UP FOR GRABS. Anyone can do it in the way that THEY wish to do it. You may refer to the author if you want a better idea of how the characters will be and how they'll react but other than that it's YOUR story and how you deal with it is all YOU.