Undertale How to achieve a secret ending?

I don't think it is funny, and my poor english should be blamed

[itztoby]

0:40
Phone battey is dead
Me: OH NO!

[wrongwrabbit]

0:20
*let me drive my van into your heart*

[kevincornell]

Me: huh that song at the end... it it’s Sr Pelo’s magnificent, beautiful version of Megalovania

[deangeloenriquez]

I thought the reasoning would’ve been that the magical barrier actually surrounds all of the underground so you couldn’t exit after entering

[ilikebirds]

*phone battery is dead*
Frisk: ah sh*t here we go again

[toastbrot]

0:19 wtf wat was that?
0:54 WHY IS PELO FOLLOWING ME EVERYWHERE?

[spectorlandnow]

Frisk dead
Sad music
...
SANESSS GAME OVER ENABLE

[indorianshell]

0:18
I knew that cars would replace humans

[origistile]

The Pacifist ending


The Neutral ending


The Genocide ending






And the selfish ending

[Limbo]

To cross the barrier starting from the Underground you need a human soul and a monster soul. So it wouldn't have worked anyway.

[bendy]

this possibly the only video without a undertale ship pic

[dianecatzie]

0:20
Kris: WHERE ARE WE GOING NOW!?
Toriel: I'd like you to meet the sweet human I met back in my younger day-

[Wings_Of_Nightfall]

Well, the government clearly doesn't understand the first thing about covering holes if a freaking car can crush Frisk. One non kid-friendly furry later, and the child finds out it's been trapped with the rest of the junk from Area 51. Then comes the next tragedy. Not realizing that the picture drained the phone's battery quickly, it fell back down and Flowey decided to not catch the human. Then Asgore comes through, following a lead on his wife's location, and sees Frisk's corpse. Now with the seventh soul, Asgore can go out and Genocide Run humanity and the end of life as we know it comes in the form of a big humanoid goat god.

[Master_]

0:46 that doesn't matter. We can't hurt how far we are falling from.

[matteocalindro]

0:20
RODO RO- *Ahem*
I mean
RED CAR DA!

[iskk]

Wait if the government blocked the hole then

HOW IS THERE A CAR IN THERE

[re-blitz]

I would just dig threw with my shovel app that my phone 100% has

[omri]

That is exactly what i think about undertale ending

[aliensrock]

It’s so stupid you can tell it’s not but I really want it to be

[aliasofgray]

0:24 *sees only one stocking on!*

"SANS, LOOK WHAT'S HAPPENED! YOU'VE TAUGHT CHARIEL YOUR SOCK-LEAVING HABITS!"