User blog comment:LakuitaBro01.2/Lak's Video Game Rap Battles! Season 2 Hints!/@comment-24780629-20151114050715/@comment-24780629-20151114051744

I think Papyrus is the only character who can have a match up.

I could do Sans VS Halloween Hack Dr. Andonuts but Ness or Lucas is definitely more deserving than him, plus, the connection is "Megalovania plays when you fight them". Unless Homestuck can be accounted for as a video game (I don't exactly know what it is by this point) then Sans VS Vriska Serket would be a better choice with the connection of "Megalovania, polar opposites".

Frisk... I dunno. Same goes for every other character in the game.