Sans (GG!Underfell)/In Battle.

> "*I ' m‎‎ ‎ ‎ g o n n a‎ ‎ ‎ h a v e‎ ‎ ‎ a‎ ‎ ‎ g r e a t‎ ‎ ‎ t i m e .*"
>
>

"You feel like you're going to have a bad time."

Sans (GG!Underfell) is the final boss of **Section 3 - Hell's Forest**, in both the Normal Route and Obliteration Route. He will appear right before the Delta Warriors manage to reach the Grey Door at the end of Snowdin's Forest, lunging at Kris's soul, before getting stopped by Susie and retaliating by punching her. He will then proceed to gloat about killing a younger version of herself named "Suzy," all the while Kris, fueled by rage, will ambush and stab him with their knife.

He will start in the Hostile state and will remain as such for the entire fight.

During the fight, Serious Mode will be active, changing Susie's battle expression, as well as shortening the names of certain items. The powerful Dual Heal and Red Buster will also be available; however, during the Obliteration Route, because Kris is Deceitful, Red Buster will not be a dangerous attack for Sans, but for the whole party instead, as using it will outright KO Susie and Noelle, while leaving Kris with only 1 HP.

Just like his Undertale counterpart, Sans is capable of dodging nearly every attack by sidestepping. However, that's only possible for him while he's *focused*, which can be reduced by *distracting* him with various ACTs.

After going all-out with his final attack, he will finally be too tired to continue fighting, allowing the player to decide his fate.

If Noelle has an ice weapon equipped, Noelle can cast Sleep Mist, with Sans trying to threaten the heroes before falling asleep.

If attacked, Sans will have a diagonal slash down his chest and his jaw will fall off. In his final moments, he taunts the heroes, telling them this changes nothing and that no one will care about the orphan Suzy that he murdered. He then laughs manically as Susie furiously attacks him, his body growing more and more mangled with every attack until he finally turns to dust.

If Iceshock is used, Sans seems significantly more afraid. He sits there, shaking due to the cold, murmuring in disbelief before he finally freezes over.

## Attacks

### *"I'm gonna have a great time"*

Similar to his Undertale counterpart, Sans will start the fight with a long and powerful first attack, even before allowing the player to do any action. The attack is divided into 3 sections:

1. 2 sets of Gaster Blasters will appear, the first one firing a "+" pattern at the center of the Bullet Board, while the second covering its sides.
2. Sans will turn the SOUL blue, first slamming it into the right wall, then into the upper one; it will then summon a short blue bone, followed by a wave of several of those.
3. Sans will slam the SOUL into the bottom floor, turning it red again, while summoning a Gaster blaster to cover the bottom part of the Bullet Board, then a "bone slide" will appear from the right, requiring precise movement to navigate it; the attack will conclude with two giant Gaster Blasters at the sides, covering nearly the entire Bullet Board except for the very top and bottom.

#### **Bone lines**

* While in Blue Mode, 24 lines of bones will appear at the sides, converging at the center, which requires small jumps to get through the gaps; these are made out of small bones from the bottom, and longer bones from the top of the Bullet Board. After the first 12, Sans will slam the slam the SOUL into the upper part of the Bullet Board, requiring to jump upside down.

#### **Blue and white bones**

* Both sides of the Bullet Board will be completely covered in bones, only retreating while the SOUL will be forced by gravity into their respective side. Sans will slam the SOUL into the right side, summoning 2 pairs of blue a white bones from below, before slamming it into the other side, repeating the same pattern again; he will finally slam it into the bottom part, first summoning 3 alternating blue and white bones from the right, then again from the left. this attack is only used once.

#### Horizontal platforming gauntlet 1

* A line of bones will completely cover the bottom part of the Bullet Board, while several platforms, bones at barriers and a couple of fireballs will appear, acting as a platforming gauntlet. Toward the end, a platform will be too far to be reached with a normal jump; if the SOUL doesn't make it and touches the damaging floor, time will instead freeze, allowing for a tutorial on dashing. This attack is only used once.

#### Horizontal platforming gauntlet 2

* A second platforming gauntlet will appear, this time far more focused on the use of the dash, with both high jump and lateral ones. This attack is only used once.

#### **Platforms with Gaster Blasters**

* 2 platforms will appear on the middle and top of a tall Bullet Board, which Gaster blasters appearing and shooting one at a time either at the bottom, middle, or top. Each platform can be reached only with a dash.

#### Vertical platforming gauntlet 1

* Several platforms will rise up from a tall Bullet Board, where either a series of horizontal bones with small gaps between them or undulating fireballs must be passed through to continue below. The bottom part will be filled with bones for the entire attack. This attack is used only once.

#### **Horizontal bone slides**

* Sans will slam the SOUL to the top, where sets of small bones will appear on the top, from the right, and large bones will appear at the bottom, from the left.

#### Horizontal platforming gauntlet 3

* Several narrow corridors composed of bones will appear from the left, alongside several platforms. During the attack, various Gaster Blasters will appear at specific locations, damaging the SOUL if it takes too long to progress into the attack.

#### Cyan and Orange Gaster Blasters

* Several giant Gaster Blasters will appear in a massive Bullet Board, firing either a cyan or orange laser, depending on their color. Because of the size of the lasers, it's very hard to actually avoid them, instead it should be prioritized to either moving or standing still, depending on the color of the upcoming laser. This is the only attack where the SOUL will always be red.

#### Vertical platforming gauntlet 2

* Similar to the first version, but having to pass through a pair of horizontal bones with small gaps between them, an enclosed platforming room with a vertical bone moving up and down to block the passage, and a long vertical bone with an horizontal one and a serpentine line of fireballs blocking a series of platforms, reachable with a precise side dash. At the very end, a Gaster Blaster will cover the top of the Bullet Board.

##### Vertical Bone

* Upon reaching 50% HP, a vertical bone will appear at the bottom of the battle interface, from right to left, capable of hitting the SOUL when overing over any battle command buttons. As Sans's health decrease, it will increase the speed the bone moves.

### "*Let's get this over with*"

Sans will only perform his final attack after reaching 10% HP or less. As the longest and most complex one, it will be divided into several sections:

1. 2 sets of 6 thin Gaster Blasters, 3 at the top and 3 at the left of the Bullet Board in slightly different positions, will all fire at the same time, leaving only small square gaps for the SOUL to be safe from.
2. Sans will slam the SOUL to the right side, turning it blue, while summoning 6 thin Gaster Blasters from the top to completely cover the right side; a platform will appear at the center, reachable with a dash to avoid the attack, while a giant Gaster Blaster will appear at the left, covering the entire Bullet Board except for the very top and bottom.
3. Sans will slam the SOUL around a couple of times, before settling for the bottom, summoning a bone slide from the left, requiring 2 precise jumps to be navigated safely; the SOUL will then turn red, where a much faster and longer bone slide will appear from the right.
4. Sans will trash the SOUL around for longer, before turning it red and summoning 7 sets of 4 giant Gaster Blasters alternating in diagonal and cardinal positions, all either cyan or orange, firing all at once and covering the entire Bullet Board.
5. At last but not least, Sans will summon a spinning ring of Gaster Blasters, requiring constant circular motion from the SOUL to avoid it. After it has ended, Sans will start to slam the SOUL all around, gradually increasing in intensity, until it deals 7 total non-lethal damage; he will then slam up and down the battle box itself, until he gradually grows tired, and he will stop fighting altogether.

## Mechanics

### Blue SOUL mode

During most of Sans's attacks, the Blue SOUL power will be active, which will affect the SOUL's normal movement capabilities by making it constantly affected by gravity towards the bottom, or any other directions that Sans dictates. Pressing the “Up” button will cause the SOUL to effectively jump, how tall the jump will be is dependent on how long the button was held; in case gravity was altered by Sans, the button in the opposite directions has to be pressed instead.

Additionally, pressing "[COMFIRM]" will cause the SOUL to *dash* in a straight line, the direction dependent on whatever directional keys are pressed, and can be done both when landed and while in the air. After dashing while in the air, it can be performed again only after landing on solid ground; if the dash was performed while on the ground, it will instead recharge in less than a second, allowing to dash again.

## Strategy

As Sans is capable of dodging nearly any attack when focused, a major effort must be put into *distracting* him, allowing the opportunity for an all out attack, especially for powerful moves like *Red Buster* (except for the Obliteration Route, which it will be extremely harmful for the Delta Warriors instead). This can be done in the following ways:

* Kris, Susie and Noelle's **Distract ACTs** will all make Sans unable to dodge attacks for 1 turn, which can be stacked up to 3 turns total; this is visually indicated by how many sweat beads Sans has on his front, each one representing a turn he can't dodge.
	+ In case the player wants to give Noelle a more passive role while the other do the heavy lifting, it can be considered to only use her Distract ACT, as it will always allow Kris and Susie to deal damage in the same turn.
* **XDistract** will simply have the effect of combining every Distract ACTs at once, for the max 3 turns total.

Alternatively, the Bluster Blade's critical attack has an unique interaction while Sans is focused: as Sans dodges by moving to the side while focused, the large horizontal slice will still catch him regardless. Because of this, he will also be unable to avoid any other attacks from Susie and Noelle.

## Flavor Text

* *You feel like you're going to have a bad time.* **[First turn]**
* *A once simple skeleton gone mad.* **[Check]**
* *It smells of burning charcoal.* **[Neutral]**
* *Sans chuckles under his breath.* **[Neutral]**
* *Sans gazes into your SOUL.* **[Neutral]**
* *Sans flashes a demented smile.* **[Neutral]**
* *The bones swirl around you.* **[Neutral]**
* *You try to talk to Sans.* **[Talk]**
	+ *Seems like talking won't do any good.*
* *Seems like talking won't do any good.* **[2nd+ Talk]**
* *You try talking to Sans.* **[Talk after final attack]**
	+ *...*
	+ *He's too tired to respond.*
* *You try to get behind Sans for another backstab.* **[Kris's Distract]**
* *You tell Sans that Papyrus is nearby!* **[Kris's Distract]**
* *You call Sans a smiley trashbag.* **[Kris's Distract]**
* *Susie mocks Sans for failing to kill her.* **[Susie's Distract]**
* *Susie quickly breaks down a nearby tree!* **[Susie's Distract]**
* *Noelle builds a snow sculpture and destroy it loudly!* **[Noelle's Distract]**
* *Noelle swirls icy wind around Sans. Sans seems nervous.* **[Noelle's Distract]**
* *You, Susie, and Noelle distract Sans by being very obnoxious!* **[X-Distract]**

* *Sans can barely concentrate.* **[Sans wasn't already distracted]**
* *Sans can't seem to concentrate! Lasts 2 turns.* **[Sans was already distracted for 1 turn]**
* *Sans can't seem to concentrate! Lasts 3 turns.* **[Sans was already distracted for 2 turns]**
* *Sans regains his focus.* **[After Distract effect wears off]**

* *The burning smells seems to be waning.* **[Low HP]**
* *Sans looks like he's about to collapse. Sans is acting erratic.* **[Low HP]**
* *Sans's face dementedly distorts.* **[Low HP]**
* *Sans is too tired to fight.* **[After final attack]**
* *Looks like Sans is too distracted to be distracted.* **[Kris, Susie and Noelle's Distract or X-Distract after final attack]**

## Quotes

* so... **[Start of the fight]**
	+ you three are ganging up on me?
	+ some heroes you are.
	+ to think you ruined my life...
	+ and came back to ruin it again.
	+ heheheheh.
	+ you're gonna get what you deserve.
	+ and me...?

* *(screen fades to black, before turning on again, the Bullet Board now being visible.*
	+ I ' m‎ ‎ ‎ g o n n a‎ ‎ ‎ h a v e‎ ‎ ‎ a‎ ‎ ‎ g r e a t‎ ‎ ‎ t i m e .

* Ready? **[Start of the fight on every subsequent attempt]**
* shut the hell up, kris. **[Talk]**
	+ just lay on the ground and let me rip you apart.

* you and your damn "determination". **[3rd attack]**
	+ all living things lose the will to live at some point.
	+ for you, that point is NOW.
* you...! **[4th attack, if the dash was not used]**
	+ all of you looked SHOCKED, and yet you barely dodged it.
	+ all you humans deserve to die at the hands of monsterkind.
* you human scum are all the same. **[4th attack, if the dash was used]**
	+ knowing EXACTLY what to do, like you're playing god or something.
	+ all you humans deserve to die at the hands of monsterkind.
* i've been waiting for this moment for a long time. **[50% HP, 1st turn]**
	+ to finally get my revenge on humanity, and rid this world of its problems, once and for all.
* but yet...out of all potential timelines... **[50% HP, 2nd turn]**
	+ you three just happen to end up here?
	+ heh...
	+ i doubt it.
* and the worst part? **[50% HP, 3rd turn]**
	+ the look on your face, how confused you seem...
	+ you're COMPLETELY oblivious to what you did to me.
	+ what a fucking insult.
* i'll rip that goddamn soul out of your cold, dead body. **[50% HP, 4th turn]**
	+ and you'll feel the wrath of that so called "determination" that cost me my life.
* you... you really never give up, do you? **[10% HP]**
	+ i'm a busy guy. places to be, people to kill.
	+ let's get this over with.
* i... \*huff\* i will... **[After final attack]**
* you... little... **[If pacified with Sleep Mist]**
	+ when i.. .get my hands... on you...
	+ you'll look... just like...
	+ (*Sans will fall asleep.*)
* heh heh heh... **[If killed]**
	+ so what goes 'round... comes 'round...
	+ heheheheheheh...
	+ you think this changes anything?
	+ this world...is still...kill or be killed.
	+ and that lil orphan...
	+ that orphan named suzy...
	+ you think this avenges her...?
	+ WHO CARES ABOUT HER?
	+ AS IF SHE HAS A FAMILY THAT CARES IF SHE'S DEAD.
	+ *(Sans will start laughing maniacally, while Susie will frantically hit him, until he turns into a pile of mangled body parts and dust.)*

* it's...so cold...**[If killed with Ice Shock]**
	+ the cruelty...of fate...
	+ how...c-could...
	+ .....

### [Post fight dialogue]

#### (If killed)

*(Susie will be visibly panting, with a blood stained Heavy Branch in her hand.)*

* **[Noelle]** ...
* **[Noelle]** Susie?
* **[Noelle]** Susie, are you...?

*(Susie will stop for a moment, before putting away her weapon.)*

* **[Susie]** ...
* **[Susie]** ...let's just go.
* **[Noelle]** Susie, I don't think you're--
* **[Susie]** I said let's go.
* **[Noelle]** ...

*(Kris, Susie and Noelle will jump through the grey door)*

#### (If killed with Ice Shock)

* **[Susie]** Noelle...?
* **[Susie]** How the hell did that...
* **[Noelle]** ...
* **[Noelle]** I...
* **[Susie]** That's kinda cool, actually.
* **[Noelle]** But...
* **[Noelle]** Why did it only freeze him?
* **[Susie]** ...
* **[Susie]** I dunno.
* **[Susie]** Maybe we ask whoever the hell is putting these doors up.
* **[Susie]** Speaking of...
* **[Susie]** We're done with this guy.
* **[Susie]** Let's go.
* **[Noelle]** ...Right!

*(Kris, Susie and Noelle will jump through the grey door.)*