This may become my main oc, sorry Monk ;-;

Undertoad!Mario: Hey there, kid.

Rene: .-.

(You accidentally trip over and stab Mario in the chest.)

Rene: SHIT-

Mario: . . .
(Mario turns to dust.)

Rene: Whoops…

Luigi: …

Rene: Uhh… my bad.. that was an accident..

Luigi: Time to do somethin’ real unfriendly.

Rene: Uhh… let’s calm down..

(Luigi snaps his fingers, and starts floating.)

Rene: Hm? Oh uh, hey?

Undertoad!Luigi: Hello! It’s me, The Great Luigi!

Rene: uh.. nice to meet you.

(If you couldn’t tell, this is an Undertale AU)

(I could tell by the names and the character designs lmao-)

(And a huge part of the RP is Mario dying because of something Rene does)

(d a m m i t -)

(So uhhhh do something)

(but w h a t -)

(Idk)

Rene: Oh shit-

(The second part where they sing together is a bunch of caution notes surrounded by fire notes.)

Rene: Hell-

(Later, the song ends.)

(; - ;)

(Don’t worry, he’s gonna be fine)

(; - ;)

Mario: Hey, uhh… Wanna have a rap battle?

Rene: Hm. Sure, why not?

(You and Mario sing https://youtube.com/watch?v=PvLGM3qoZ00&feature=share.)

(After the song)
Mario: Heh. Pretty good.

Rene: Thanks..

Mario: So, uhh… What now?

Rene: I dunno.

(Mario hands you a knife.)
Mario: I need to trust that you won’t kill anyone. Hold this knife, but don’t kill me. Okay?

Rene: …

(Dark Fury Mario appears, to help Luigi.)
Mario: Look who’s back in the fight…

Rene: …

Mario: Heh heh heh…

Rene: Uh… sorry?

(You get an idea. You decide to challenge them to a rap battle. You pull out your microphone.)

Rene: Alright, how about we do a rap battle. So I have a chance at not dying-

Luigi: …Fine. But we won’t go easy on ya.

Rene: Alright! Works for me.

(You, Mario, and Luigi sing https://youtube.com/watch?v=Gc7aMOFXCJE&feature=share. There are 9 keys instead of 4. When Mario sings, there are purple fire notes that kill you if you hit them. When Luigi sings, there are caution sign notes that kill you if you miss them. When they both sing, both purple fire notes and caution sign notes appear.)

(drawing's done :D)
(You see Flipped-Out Cory standing slightly far away from you. There are a bunch of corpses around him.)

Rene: Uh… what’re you doin?

Flipped-Out Cory: Hehe...
(Flipped-Out Cory pulls out a can of gas.)

Rene: …

Rene: I’m good..
(C O R O N A -)

(LMAO-)
Flipped-Out Cory: Come on...

Rene: Nah..
(SIX FEET CORY! S I X F E E T -)

(Flipped-Out Cory throws another knife at you.)

*They barely dodge it*
Rene: Shit-

Flipped-Out Cory: You can't keep dodging forever... Hehe...

Rene: Yeah yeah, I know-

(oh btw the c u b e in Cory's left hand in the drawing is a matchbox)
Flipped-Out Cory: ...

(cory’s abt to commit arson-)
Rene: …

(Flipped-Out Cory pulls a match out of the box, and lights it.)

(oooo that’s really good :D)
Rene: ?!

Cory: T-they're all... Hehe...

Rene: …

Cory: Y-you! Friend or foe?

Rene: Uh.. friend?

Cory: D-doesn't matter. I'll kill you anyway.

Rene: How about we don’t do that now.?

Cory: HAHAHAHAHAHAHAHA

Rene: …

(One of the people who are not dead, but severely injured, tries to warn you.)
???: R-r-run...

*Rene slowly moves back*

Cory: Oh, not so fast..
(Flipped-Out Cory throws a knife at you.)

*Rene ducks down, dodging it*

Cory: Hehe...

Rene: Let’s not do this..

(Flipped-Out Cory's blood-covered knife shines.)

Rene: …

(Flipped-Out Cory slowly walks toward you.)

*Rene backs up*

Flipped-Out Cory: Come here... Hehe...