Marik develops an evil and needlessly complex scheme to send all of the main characters (and Tristan) to a new show, but it backfires when he is sent there with them. Now the heroes must save Equestria from Marik's evil and get back home. Come on! There aren't even any trading cards in Equestria!
There is a Tropes page for this fic here: http://tvtropes.org/pmwiki/pmwiki.php/FanFic/ScrewTheMagicIHaveFriendship
Yugioh Characters appearing in this fan fiction (in order of whatever I feel like):
-Seto Kaiba
-Mokuba
-Shadi
-Unnamed hair guy
-Yugi Moto and Yami
-Joey Wheeler
-Tea Gardner
-Tristan Timothy Taylor
-Marik Ishtar and Melvin
-Duke Devlin
With guest appearances from:
-Yugi's Grandfather
-The Dark Master Zorc
-Bakura and Florence
-Maximillion Pegasus
-The Great and Powerful Dartz
-Rafael
-Valon
-Alister
i'ts to funny i can't fell sorry for him
Not interested in reading a Yugioh crossover, but I needed to point out an error in your description:
It's Yugi, not Yugioh. Yugioh is the title of the series, not the name of the character.
3134986 That was my freaking spell checker. I know that's wrong, I just didn't catch it.
3134986 Okay, now I fixed it
That was amazing. 3134986 and it's not a Yugioh Crossover, it's a Yugioh The Abridged Series Crossover!
Allow me to introduce me with my favorite episode!
Ghost Nappa..........
Bwahahahaahabahahah!
Yes!!!
Because of Yu-Gi-Oh! Abridged I shall always refer to Yami Marik as Melvin. He's so funny and the whole series is funny.
So in a past life Seto Kaiba was Discord? Makes sense I guess.
And of course yay for Ghost Nappa.
that makes as much sense as this
I want a hug now. 3135100
It's spelt Kaiba.
Just saying.
3138007FFFFFFFFFFFFFFFUUUUUUUUUUUUUUUUU-
3138103 I noticed a few other errors. Minor ones, but they were still there. Maybe you should get an editor.
Other than that this story is hilarious.
I laughed so hard my brother came into my room to see what I was laughing so hard about.
3139665 Abridged Yami is my favorite. I think he's even funnier than Tristan. If you haven't also noticed I really like the: "pretty f***ed up, Joey" joke from season zero.
*Takes off shades*
They brought sexy back?!
I really shouldn't like this for its blatant use of jokes stolen nearly word-for-word from Yugioh the Abridged series.
.......
But I do. Far, far too much.
Too... much... laughing. Too... many... references.
Let Melvin introduce Mr Stabby to all the girls!
3140658
Joey: That'd be pretty f***ed up.
Yugi: pretty f***ed up, Joey.
Melvin will show up in due time, my friend.
PENGUINS
Best comedy-crossover ever.... all time.
3141553 If you could spread the word, that would be awesome. I don't have many Whatchers, so this story is likely to fall into obscurity unless people go out of their way to see it.
fuck I love this story!!!
3140658 Melvin no!
Melvin yes! 
When are you going to include "Oh my god a gaint rock!" and "Spongepants Squarebob"?
3142028 only if they come up.
Hey guys can I be in the fanfiction?
I expected Tristan to at some point shout out "Just f*** already!"
this is the most glorious thing i have read in my entire life
HAVE ALL THE MOUSTACHE'S!
3143161NO! You can go hang out with Jaden Yuki, because you two deserve each other!
Too Meta for the Cannon Yugioh characters. Abridged Series then?
if that was the case, then you should of use Friendship is Witchcraft versions of the MLP FIM characters.
3148577 It's better to have a normal group. too much silly kills it.
I know it probably won't happen, but I really, really want the mane six to beat Yugi and everyone else in frustration before blasting them with the elements to send them away.
I was reminded of that one guy from pokemon R/S/E who asks you where you're from and you can only answer yes or no.
This just keeps getting better and better.
That's crazy! 3141553
That's crazy! 3150102
There is a lack of stabbing in this chapter!
3158215 there will be Melvin and a lot of ass kicking in the next chapter. Though I don't plan on any death.
Ha. Bringing in the fandom's nickname for the seamonster. Hilarious.
If the next chapter includes Melvin getting away before the fight is concluded -
Yami: "I don't understand. How could Melvin defeat us without challenging us to a children's card game."
Ah Melvin, the most hillariously evil supervillan you'll ever meet.
That is a perfectly reasonable excuse.
Also, it's spelt "straight."
There better be a hug in the next chapter
3182154 With who? Who could Melvin possibly hug? I'm not killing off the cast of YGOTAS, and I'm certainly not having a pony get hugged! Jeez! Why do you like stabbing so much?