Papyrus & Sans

Papyrus & Sans are skeletons from the Undertale series. They both first debuted in the same game - Undertale.

Moveset
At the beginning of the match, Papyrus will be the one fighting, with Sans just chilling in the background, watching. But Papyrus has a hidden meter called the HP meter. For Stock Battles, he's 150 HP per stock. For Timed Battles, he's 150 HP per minute on the clock, or 2.5 HP for every second. For Stamina Battles, he's a ratio of 3:4 where 4 is the HP shown on the display and 3 is the hidden HP meter. This hidden HP will only go down via opponents' attacks. It does not reset after losing a stock (Stock Battle) or losing a point (Timed Battle). If Papyrus's hidden HP reaches 0, he turns to dust, aka dying. This will invite Sans to leave the background and avenge his brother. If Sans loses a stock or point, then Papyrus won't come back. Sans is very slow, has very short jumps, and is incredibly easy to KO... if you can even hit him, as his dodges are godlike, and will be his main mobility method. His dodge roll also has him just slide in the chosen direction. All of Sans's attacks deals a set 1% damage, but they're all faster, have more range, are much more spammable, and inflict a poison effect on hit opponents that last for 5 seconds per hit. Both Papyrus and Sans can double jump, but have no additional movement options.

Papyrus
Any bones that slide across the ground will disappear at the edge of the stage or platform they were summoned on.

Sans
Unless stated otherwise, assume all of Sans's attacks are the same as the Papyrus equivalent, with the changes specified above and below applied.

Taunts
Up Taunt: Papyrus stomps his feet on the ground in anger. Sans just shrugs and shakes his head towards the screen, winking.

Side Taunt: Papyrus pulls out the Dating Manual, flips through its pages, then tosses it away. Sans pulls out a bottle with a random condiment inside (ketchup, mustard, horseradish, etc.) and chugs it down, then throws the bottle away.

Down Taunt: Papyrus ponders to himself, scratching his lower jaw, in reference to an unused sprite of him. Sans stares at the screen with his creepy, blank, pupil-less eyes.

Papyrus
Papyrus holds his hands to his cheeks while blushing, then does his "cool" pose with his cape waving triumphantly in the wind. Sans is in the background, clapping.

Papyrus has his back to the camera, then turns around with a plate of his world-famous spaghetti, offering it towards the camera. Sans is in the background, sleeping.

Papyrus laughs victoriously, only to have Sans interrupt it with his trombone. This prompts Papyrus to begin stomping the ground, while Sans slightly chuckles.

Sans
Sans stares at the screen with his blank eyes. Then, the screen blinks black. When it unblinks, Sans is gone.

Sans is just sleeping standing up.

Sans covers the camera in bones. A text box appears, and Sans says, "get dunked on." In Comic Sans font, of course.

Alts
2. The duo take on their black and white colors from their in-battle sprites from Undertale.

3. Papyrus's scarf, gloves, boots, and armor text turn green, and Sans's jacket and slippers turn pink, as an original color scheme.

4. Papyrus's scarf, gloves, boots, and armor text turn purple, and Sans's jacket and slippers turn yellow, intended to be an original color scheme, but being an unintentional reference to Wario and Waluigi from the Super Mario series.

5. Papyrus and Sans take on the other's color scheme, with Papyrus's red becoming blue, and Sans's blue becoming red. His shorts also turn the color of the blue on Papyrus's armor.

6. Papyrus's armor turns dark gray, and Sans's jacket and slippers turn white, in reference to Undyne's armor and Alphys's lab coat respectively.

7. Papyrus wears his COOL DUDE outfit from the hangout/date you can have with him in Undertale. Sans's jacket and slippers turn orange, referring to the basketballs on Papyrus's shoulders.

8. Papyrus wears his JOGbOY outfit from the date with Alphys/Alphys's training session from Undertale. Sans's jacket and slippers turn brown, not really in reference to anything.

Stage Entrance
Papyrus drives in with his red sports car. Sans also heads into the background on a vehicle, but his is a tricycle. Both vehicles are seen in the credits of the True Pacifist ending of Undertale.

Classic Mode: IT'S THE HUMAN!
Teams up with monster characters to fight human characters.

Boxing Ring Title: NYEH HEH HEH!/you're gonna have a bad time.
For Papyrus and Sans respectively.