At Malicious Regime.

Inside the throne room is every force of evil gather where a female demon stood above the Pit.

This demon called Lili the daughter of Mahishi and Davoth or also know as Malevolenternatus.

Lili: "Hello father" she said looking at Malevolenternatus who chuckle softly.

Malevolenternatus: "It time for the calling my beloved daughter" he said which she bow and summon a mic while Malevolenternatus summon instruments.

Throughout the Omniverses.

Everyone was minding their own business when they heard music filled the air.

Lili: "Calling all the monsters, calling all the monsters
Calling all, I'm calling all, I'm calling all the monsters" she sing.

Back at Malicious Regime.

Every evil start to dance to the music as Lili continues to sing.

"Oh yeah (Oh)
Oh yeah (Oh)
Oh yeah (Oh)
Eh, eh" she sing.

Both Mastermind and Elegia dance to the music like a couple until Mastermind spin Elegia which she laugh.

"Heart thumps and you jump, comin' down with goosebumps
You dare to go there? I'ma, I'ma get you so scared
(We're wanting to, yeah)
(We're haunting you, yeah)
(We're wanting to, yeah)
(Yeah, yeah, yeah)
You stayed in too late to be getting afraid
This scene extreme, I'ma, I'ma get you so scared
(We're wanting to, yeah)
(We're haunting you, yeah)
(We're wanting to, yeah)
(Yeah, yeah, yeah)"

Throughout the Omniverses.

Many people start to feel small fear yet that small fear is just enough for strange mysterious shadows to escape their hearts.

Shadows: "Gonna get your body shakin'
Wishin' you could just awaken (Here we go)" they sing.

Back at Malicious Regime.

Chorus: "Tonight, all the monsters gonna dance (Oh yeah)
We're comin' to get ya
Tonight, all the monsters gonna dance (Oh yeah)
We're comin' to get ya
If you're only dreamin'
Why I hear you screamin'?
Tonight, all the monsters gonna dance (Oh yeah)
We're comin' to get ya (Yeah, yeah, yeah)" they sing.

Lili: "Oh yeah (Oh)
Oh yeah (Oh)
Oh yeah (Oh)
Hey (Eh, eh)" she sing.

"You hide or you try, kiss tomorrow goodbye
We thrill to your chill, buckin' for a freak out
(We're wanting to, yeah)
(We're haunting you, yeah)
(We're wanting to, yeah)
(Yeah, yeah, yeah)
We might just bite underneath the moonlight
More fun if you run, I'm, I'm already chasin'
(We're wanting to, yeah)
(We're haunting you, yeah)
(We're wanting to, yeah)
(Yeah, yeah, yeah)" she sing.

Out of nowhere those same mysterious shadows appear all throughout Malicious Regime and change into people worst fears.

Fears: "Gonna get your body shakin'
Wishin' you could just awaken (Here we go)" they sing.

Chorus: "Tonight, all the monsters gonna dance (Oh yeah)
We're comin' to get ya
Tonight, all the monsters gonna dance (Oh yeah)
We're comin' to get ya
If you're only dreamin'
Why I hear you screamin'?
Tonight, all the monsters gonna dance (Oh yeah)
We're comin' to get ya (You ready?)" they sing.

Out of nowhere Malevolenternatus started to sing.

Malevolenternatus: "Calling all the ghouls, the ghosts
The zombies, bugs, and creepy crawlies
Imps and fairies, lizard people and loch ness
I'll give you a beat to rock with
I'm reporting live from Monster Central
Guests, I must remind you, do not wander
We don't barter, trade, or bargain
Calling the mischievous
No need to think, we're Halloweenie-ing
So come to the dance, be obedient
When you hit the dance floor, no leaving" he sing.

Lili: "Gonna paint it red
Get inside your head, head, head" she sing.

Fears: "Gonna get your body shakin'
Wishin' you could just awaken (Dance)
(Sing)" they sing.

Chorus: "Tonight, all the monsters gonna dance
Tonight, all the monsters gonna dance (Oh yeah)
We're comin' to get ya
If you're only dreamin' (If you're only dreamin')
Why I hear you screamin'? (Why you screamin'?)
Tonight, all the monsters gonna dance (We gonna dance)
We're comin' to get ya (Yeah, yeah, yeah)" they sing.

Lili: "Oh yeah (Oh)
Oh yeah (Oh)
Oh yeah (Oh)
We're comin' to get ya" she sing as the music end.