all of the cmc have cousins coming to visit and they all have 1 thing in common they are all blank flanks but instead of joining them they decide to challenge them to see who get their cutiemarks faster

A remake of Friendship is eternal, mashing together the old chapters with more details and new stories throughout the tale. Sonic FIER (pronounced Fire. ain't i a stinker?)
Eggman has invaded Equestria to locate the elements of harmony and rule over everything, it's up to Sonic and his friends along with some new pony friends to stop him from fulfilling his wicked deed.
hope you enjoy

What happens when you find yourself in a completely new situation. No way back home. Lost. Surrounded by strangers, who stole you away from everything you cared about? Flynn had to ask those questions as he woke up from his normal life into this nightmare.

Several conflicts are coming to a head. Visorak find a portal to Equestria in an abandoned castle just as Queen Chrysalis begins a new campaign. King Sombra, sensing the chaos, joins in. What will become of Princess Celestia's idyllic little empire, now besieged on every side?

This is a Bionicle - MLP crossover. It will be difficult to understand or enjoy it without some acquaintance with Bionicle lore. I would encourage everyone to take a look at Bionicle in its entirety, but for quick reference, here's The Bionicle Wiki.

Warning: Inflation.
Derpy Hooves wants to buy a balloon. But she accidentally figured out a way to become one. But then Pinkie Pie decided to make money off of this silly accident.

The Smash Ball is the most powerful weapon in the galaxy. If the Smash Ball is seen, must not be seen by human eyes, or it will show your most powerful desires you've ever wanted. Fighters have almost killed themselves for this power, and so will the ponies.

When Twilight accidentally causes a magical surge throughout Ponyville, she discovers that the only reason the Element of Harmony even work is because of the Smash Ball. She tries to keep it hidden, but Fighters all around try to take it from the Mane Six. Will the ponies be able to keep their magical source from these mysterious, yet powerful Fighters from them, or will they hopelessly fall against them, watching as Ponyville falls into a brawl?

Meanwhile, Crazy Hand is growing tired of his brother's plan. He wishes to see Chaos, unlike his brother, Master Hand, wishes to see a friendly competition. That does not stop Crazed Hand, however, and he tries his best to plummet this pitiful land into a black void like last time. Taboo has failed him, but not again. This time, he will succeed, for his Master. Will Taboo, Crazy Hand, and other villans succeed in filling this world into a black void once more?

(Author's note: This Fic is a parody. Therefore it’s full of grammar errors, plot holes and bland characters. The sole purpose of this story is to give at least some people a good laugh. Every comment from the “author” inside the story should be taken with a grain of salt. And I don’t hate Fluttershy.)

Twillight Sparkle and her five friends (even Fluttershy who's worst pony) must to stop Celesia, the evil queen of Ponyland before she can do more evil stuff. Luckily Doctor Whoovas is on their side as well as THE BEST OC EVER. Did I already mention that Fluttershy is worst pony?

(This is a 101% serious story and everybody who's laughing about this masterpiece of fan work is as bad as Fluttershy.)