Makuta Teridax, the name is almost synonymous with fear, the darkness, corruption, and evil in the universe that was cursed with his presence. But when the Great Spirits that rule it finally have him trapped they seal him in a weakened state, and put him in a lethally flawed mechanical body. They then exile him to another universe with no hope of return. A universe filled to the brim with magic and light and talking ponies.
Surely this is a world that is ripe for the picking. But Makuta's plans for world domination are cut short by a pair of would-be allies, this world's so called emissaries of the darkness. Nightmare Moon and King Sombra pledge to follow him, but their help only seems to hinder his efforts.
Will the spirit of shadow learn the magic of friendship? I sure hope not.

A bionicle meets my little pony story, because it's the only crossover combination more stupid than Doctor Who meets MLP, oh yeah, this world is completely different from my Vortexes are Magic universe, different Nightmare Moon and Sombra personalities as well.
Rated teen for possible gore
Sources; (I put the two images together, but neither are mine) http://www.fanpop.com/clubs/king-sombra/images/32672968/title/sombra-photo
and http://custombionicle.wikia.com/wiki/Teridax

Everyone knows the saying, 'No good deed ever goes unpaid', or something along the same length. In my case, however, when I discovered this odd guy kidnapping people at a Comic-Con and tried to stop it, said payment ended up with me in a world where everything's pastel-colored, and it's a virtual race of me against the world as I try to find all of the Great Kanohi scattered around the country. Oh, yeah, and for some reason, I'm now techno-organic, and I have to work with technicolor ponies to find Kanohi all around the world that grant me new forms of Toa.

...Whatever happened to 'normal'?!?!
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Crossover with Bionicle.
This fic is a Displaced fic.
Rating, main characters, and cover image subject to change.

This story is a sequel to My Little Bionicle: Quest for the masks

Contained in here are three stories, my version of "The Many Deaths of Toa Tuyet", history of Dark Mirror, and my idea of "The Kingdom" as far as my story has been written. This was done for the Nightmare Night Fanfic Event on Equestria Daily. Demon Coy is mine with normal ponies to hasbro and the bionicle character to lego.

Something strange is happening in Ponyville.
Lyra has gone missing, leading Bonbon to search Equestria for her best friend. From under her bed, Fluttershy finds a stone--the likes of which wants nothing but everypony's total submission to paranoia.
But when one thing happens in one world, something of equal significance must happen in its sister world.
And in Equestria's sister world, things are no better. Dark forces have invaded the land, taking over the minds and bodies of innocent creatures, using them as pawns in a war of power. As a result, the island's people are left with little hope for their safety, their security, their future.

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.

Gathered friends, listen to the legend of the Bionicle.

In the time before time, the world was a different place. Where biomechanical beings lived, and where three virtues of Unity, Duty, and Destiny brought a civilization together. It was a place beyond imagination and legend as the noble Toa protected their people with the elemental powers.

Now, that era is over. It is the time of ponies and magic as harmony spreads across the land of Equestria. The princesses celebrate a new addition to their ranks and seek to heal their land from the terror of Tirek.

But the past often catches up with the present. The light spring from the cracks and the shadows follow as remnants often come across the paths of these peaceful creatures. Peaceful creatures who face the legends that once roamed their world…

DISCLAIMER: The BIONICLE franchise is property of the LEGO company, and My Little Pony: Friendship is Magic belong to Lauren Faust and Hasbro. Any fan-made MLP or BIONICLE characters in this story belong to their respective owners. Also, the BIONICLE story is taken from the old toyline (2001-2009), not the 2015 reboot. Any stories from that period belong to their respective writers.

Long ago, when time first began to flow, the arcane gods created six masks. These masks were known as Masks of Power, or Kanohi, and each tribe was given two Kanohi to guard and protect until a single hero rose up to fight a great evil. But, tragedy befell the tribes as dark times fell as the sun went dark and night ruled over all... and no hero ever came to their rescue.

Thousands of years passed while the tribes lived in the darkness, they abandoned the Kanohi they guarded. Until, six ponies came across an ancient temple in the Everfree Forest. As they explored it, they saw a giant metal cylinder, buried deep within the temple. As they approached the cylinder, they noticed it was designed to hold something inside it. Little did they know, that they had discovered what had one been lost.

Discord, the Spirit of Chaos, has been defeated, trapped in stone by the Elements of Harmony. The two newly crowned princesses, Luna and Celestia, scout his palace and find a vault full of treasures and wonder.
Amongst Discord’s greatest treasures, Celestia discovers a strange golden mask, almost insignificant to the naked eye. Celestia soon learns there is a history exists behind the mask… and the one inside of it.
Inside the mask is a being who was once a ruler in a time before time. His name: Mata Nui.

Disclaimer: I don’t own Bionicle or MLP: FIM. The former belongs to Lego, while the latter belongs to Hasbro and Lauren Faust.

This story is a sequel to My Little Bionicle: Destiny is Magic

This is the tale of the moment the Order of Makuta became more than just ponies and the victims that paved the way for them. This is in canon with the main story, also sets up some story lines for later parts. Blood in here but not gore.

[Bionicle-MLP crossover]

The Great Spirit Mata Nui and Princess Celestia have been close friends since Matoran and Foal-hood. But, times have changed, and Celestia is entrusted with the Mask of Life.

Unfortunately... Due to ....Ahem... Complications, certain events cause both worlds to merge.
This Story is centered around a "pure" pony named Lhikan, and his adventures throughout Equestria in its new age. But, a bigger secret awaits...