I_Am_Your_Family: 

Discord:I'm back from the tea party!You guys look off,except for the skeletons,I'll fix it!*turns Frisk and Chara into earth ponies*Earth ponies are stronger than unicorns and pegasi and are the only pony kind that plants food.*turns Napstablook into a pegasus*Now make rainclouds!*sends Undyne to Seaquestria*Make sure to find a magical pearl so you can be a sea pony!*gives Mettaton normal pegasi wings*You are NOT an alicorn!But I can be one!

Fluttershy:What is all this noise Dis-*screams in terror and falls to the ground*Please don't kill me.
Rarity:Why did you scream Flutter-*screams in terror too*THIS IS A FASHION TRAGEDY!!!!EVEN APPLEJACK WON'T WEAR THOSE!!!
Rainbow Dash:Can you guys sto-*another scream of terror*GHOSTS ACTUALLY EXIST?!!
Twilight Sparkle:I'm trying to do paperwork,so could you please qui-Oh.I have never seen you in Ponyville before,or anywhere.I'm Princess Twilight Sparkle,the princess of friendship the,spirit of the element of magic,but you probably knew that already.Who are you wonderful creatures?

Napstablook: ....oh noooooo.......i-i'm s-sorry for....s-scaring you............oooooohhhhhh *floats into a nearby tree* sssooooooorrrryyyyyyyyy................................

US! Mettaton: *goes behind US! Napstablook* W-we're s-sorry.............. :(

Mettaton: And how DARE you call me a fashion tragedy, darling! I am the DEFINITION of FABULOUS!!!~ *poses dramatically*

Sans: heh, sure. don't worry....uh....ponies. we promise we're not HORSING around. ;)

Papyrus: SSSAANNNNSS!!!!!! >:O STOP RUINING MY DAY!! *stomping in frustration*

US! Papyrus: aw, relax, other me. but we should probably stop STALLING and answer questions.

US! Sans: PAPYRUS IS R- WAIT A SECOND................DID YOU JUST MAKE A PUN?!!!

US! Papyrus: hehe. i guess you got me red HOOVED.

US! Sans and Papyrus: UUUURRGH!!!!!!!

US! Napstablook: what's wrong with ghosts? :(

Undyne: Watch what ya say, punks! 

Alphys: W-we are n-not going to k-kill you! 

Toriel: Yes, we are monsters. Nice ones..........well, except for the flower.

Flowey: HEY! D:<

Asriel: Y-yeah! I'm Asriel, prince of the Underground. This is Frisk; they are the ambassador for us in the human world!

Frisk: *waves shyly*

Me: The name's Samantha, Samantha Stark. These are my friends: Toriel, Napstablook, Mettaton, Undyne, Alphys, Sans, Papyrus, Chara, and Flowey. The others are their alternate versions of themselves!

US! Asgore: It is nice to meet you. We have been allowed here by Mister Discord. 

Chara: The false spirit of chaos. >;P

Me: Chara! >:( Stop being mean!!

Toriel: Anyways, we have come here for a sleepover with the pink pony.

Papyrus: YES! THE ONE YOU CALL PINKIE PIE!!!!! :D

Me: But, before we ask for your names, we have another comment from an anon to answer! *scroll appears*

Horrible_Story: I watched My Little Pony The Movie and I think there is a more fitting creature that Undyne could be.It is called a hippogriff.They can turn into sea ponies anytime,and Undyne is a fish.

Me: Well, I guess that makes sense. Undyne! Go get a magical pearl so that you can be a sea pony! :D

Undyne: Ugh, fine! *walks into the portal opened by Discord*

Me: To be honest, I haven't watched the movie. I didn't catch up with the seasons either. I just started watching the tv show last weekend and school has made it IMPOSSIBLE to watch them.   -_-

Chara: Wait! If I'm an Earth Pony, how am I supposed to hold a knife?!

Sans: you don't brat. that just means one less thing to worry about. 

Chara: *huffs* Stupid Smiley Trashbag.

Napstablook: *currently flying away in sadness and making a rain cloud*

Me: Oh, poor Blookster. :( His sadness makes me sad. But, it is nice to meet you Princess Twilight Sparkle and co.! I am kind of the only person that is familiar with you. The others are kind of new to the Surface world! Don't mind them. They are really sweet and kind folks! Speaking of others, where are the Grillby's and Muffet's. 

Grillby's and Muffet's: *falls through a portal to here*

US! Papyrus: heh. that answers your question.

(Thank you guys SO much! We are at 98 comments and we just need two more for the ULTIMATE prize! Remember, you can request which fandom I should do my next Q&A about! I am also going to put some pictures of Grillby and Muffet as ponies too! Here you go:)

Haha! Was making Muffet while listening to someone singing Spider Dance! xD)