So I was helping SammyTheDragonLord to make the Haunted + Undertale a thing, and this is what I made and this just came into my mine. Of course I switch the role of Luke and Mia's sister because well, you'll see.

Collin of course will be Asriel and Herobrine is Flowey, him as a Flowey looks cool, and still need to have whites eyes which I did. The emperor will definitely be Chara, why not make him as Chara since he tried to kill Grayson. As for Frisk, it will be us, like using our own character, because in game we are controlling Frisk where to go. So I use my OC character Alex.

Mia is our mommy :3 Drake and Armen as the skelebros, Grayson as Undyne which I can't find the right design for him. (WHY ARE YOU HARD TO FIND A RIGHT DESIGN GRAYSON!!!) Luke as Alphys because why not, I still remembered that Luke told me in the chat in Drake's livestream wondering what's my username based on. Of course Anime!

HOI IM TEMMIE! (Yes the derpy enderman, never forget about him)
I know that Angelina (Drake's sister) and Emmit are not in the Haunted but I just wanted add them, Angelina as Napstablook and Emmit as Mettaton. Muffet, I don't know who's going to be muffet.

And lastly...

Mia's sister, Mairyn, why, because her scar on her left eye (or right, idk) made me think of Gaster cause he has a crack on his eye. So why not make her as Gaster. For Asgore, one of Grayson friend Tyler, he is the helper for the Haunted but I wanted to add him, soon I am going to draw him, and the others, probably gonna remake their design.

Frisk - Us (our characters)
Chara - The Emperor (Mathew, he needs a name.)
Flowey - Herobrine
Asriel - Collin
Toriel - Mia
Sans - Drake
Papyrus - Armen
Undyne - Grayson
Alphys - Luke
Napstablook - Angelina
Mettaton - Emmit
Gaster - Mairyn
Asgore - Tyler

Also I need to make a design for Grayson and Mettaton design for the Genocide, if you guys wanted me to make them for the GenocideRoute, I will do them. Also gonna suffer if someone could help me with them. Anyway, here it is SammyTheDragonLord