[ECHO - GUMI]
Undyne: IM GONNA BURN MY HOUSE DOWN INTO AN UGLY BLACK

Sans: IM GONNA RUN AWAY NOW AND NEVER LOOK BACK

Undyne: IM GONNA BURN MY HOUSE DOWN INTO AN UGLY BLACK

Sans: IM GONNA RUN AWAY NOW AND NEVER LOOK BACK

Undyne: IM GONNA BURN MY HOUSE DOWN INTO AN UGLY BLACK

Sans: IM GONNA RUN AWAY NOW AND NEVER LOOK BACK

Undyne: IM GONNA BURN MY HOUSE DOWN INTO AN UGLY BLACK

Sans: IM GONNA RUN AWAY NOW AND NEVER LOOK BACK, AND NEVER LOOK BACK

Undyne: AND NEVER LOOK BACK

Sans: AND NEVER LOOK BACK

Undyne: AND NEVER LOOK BACK! What the hell's going on can someone tell me please?! Why Im switching faster than the channels on TV?

Sans: I'm black, then Im white, NO! Something isnt right! My enemy's invisible, I dont know how to fight.

Undyne: THE TREMBLING FEAR

Sans: IS MORE THAN I CAN TAKE

Undyne: WHEN IM UP AGAINST

Sans: THE ECHO IN THE MIRROR

Undyne and Sans: ECHO ECHO ECHO ECHO ECHO-CHO-CHO ECHO ECHO ECHO ECHO ECHO ECHO-CHO-CHO

Frisk: DANG IT!
****
[HOME - Lyrical adaptation by me]
Undyne: You, with your smile and soothing voice

Sans: The smell of the pie that you baked, makes me feel at home

Undyne: We had fun sharing the books that you had

Sans: And when it's time to take a nap, a comfy rooms ready

Undyne: I dont want to leave you now.

Sans: Your dear love for me.

Toriel: Awwww!!!! ^-^

Frisk: FEKER!
****
[CALALINI - KAAI YUKI]
Undyne: On the border of your world and mine, is a prominent universe called Calalini

Sans: It's my island of dark paradise, so not every day is a vacation for me.

Undyne: Ah, I dont understand, 400, why do these people have to die?

Sans: Ah, I dont understand, Wednesday, why do you hurt me? What have I done?

Undyne and Sans: I DONT KNOW ANY PLACE I CAN HIDE, FROM THE VOICES THAT ARE TEARING ME APART INSIDE.

Undyne: Why do these demons invade my mind? I cant escape from the monsters that eat me alive.

Undyne and Sans: WHY, OH WHY, DOES CALALINI HAVE TO BE MY PARADISE LOSS? MY NIGHTMARE IN HEAVEN? WHY OH WHY DOES CALALINI HAVE TO BE MY HOME AT A LOSS? MY HEART FEELS SO HEAVY

Sans: Calalini calalini cala cala calalini, calalini, calalini, cala cala calalini

Undyne: Calalini calalini, cala cala calalini, calalini, calalini, cala cala calalini

Sans: OHHH

Frisk: THE HOLY DISGRACE OF A FRACKING !#$!!
****
[THE DISAPPEARANCE OF HATSUNE MIKU - HATSUNE MIKU]
Undyne: Uhhhhh. .

Sans: KAMWAKSHAKGSOSUAMHSPAHZHPXHVCBLDUSLWBPSUDLXHPSHSMSLXIXLSHLWUWLBXLUPSGAPSPXJXOEYWLGZPUXLXJDOSKBXLXXCLXHXLJSPSUALJSLZHXLJCOCHMSJSLSJALAJLAUALJAKAJALHAOAIAKSHJSVOCALOID

Undyne: *slowly backs away*
****
[MEGALOVANIA - UNDYNE AND SANS ON PIANO]
Undyne: Wanna have a contest on who tortures the piano most ruthlessly?

Sans: Bring it in bro
****
Undyne and Sans: *sits in front of piano and plays the intro of Megalovania*

Undyne: *begins to bash the keyboard with her fists*

Sans: *gaster blasts the piano*

Undyne: . . .0_0

Sans: So. . .what? :3

Undyne: . . .You win, Sans.