These are just things that will stay the same for every AU in Shifted Pieces.
The six humans that fell before Chara and Frisk actually managed to co-exist for a while. It wasn’t until 15 years before the main story, when the incident between the ‘Asriel’ and ‘Chara’ roles occurred, that one human died and their Soul was lost, while the other five were hunted for their Souls.
Frisk will have a personality in these AUs. Furthermore, they actually have the ability to learn magic. They can gain spells from monsters in battle or by increasing their LOVE. They can increase their defense, speed, decrease monsters’ accuracy, or in the case of LOVE-based spells, increase their attack or perform a strong attack.
Increasing attack or using magic-based attacks will also hurt ghosts. However, all magic uses MP.
The Main Characters’ Attacks
All of the characters in Shifted Pieces use attacks similar to the ones they used in Undertale; Toriel and Asgore use fire attacks, with the latter including trident attacks, Sans and Papyrus use bone attacks, blue mode, and sometimes Gaster Blasters (although Papyrus is less likely to use the Blasters), Undyne uses spears and green mode, Alphys uses electricity and yellow mode, Napstablook uses tears, but also music notes sometimes, Mettaton uses electricity, mini-Mettatons, and legs, Asriel uses some fire but also weaker versions of his attacks from Undertale, and Chara uses plant attacks (based on Storyshift) and their knife (they only have one knife, no magic knives). Frisk may learn some of these spells by befriending the character in question.
Befriending monsters isn’t limited to the ‘Papyrus’, ‘Undyne’, and ‘Alphys’ roles; the 6 main characters (excluding those in the ‘Toriel’, ‘Asgore’, ‘Asriel’, and ‘Chara’ roles) may be befriended provided no one has been killed before then. Befriending some of them may be necessary for some neutral endings and befriending all of them is necessary for the pacifist ending. Certain dates will require friendships with other characters first.
In the neutral and pacifist routes, the Royal Scientist will actually fight you, as well as the Watcher. The reason for this will vary between each AU. You can also expect appearances from Bassiere von Dohj, RGs 03 & 04, and Bratty & Catty. Also, Mad Dummy will probably appear in a different place in some AUs.
Meanwhile, in genocide, you get more actual fights. Not every main character will get a fight per se, but every main character has a way to be stronger and harder to kill.
The structure of these endings is different due to being able to kill the 'Sans,' ‘Alphys,’ and ‘Napstablook’ roles (and Napstablook in general). Because the aforementioned 'Sans' role is killable, if this happens, a neutral ending phone call will simply not occur. Here’s how they’ll work:
Near-Pacifist: Kill no one and befriend everyone but don’t complete final pacifist requirements. Everyone is happy but it’s still not a perfect ending.
Aborted Pacifist: Either kill a small amount of monsters, or kill no one but don’t befriend everyone. The Underground is at peace but the main characters are unhappy.
Small-time Killer: Kill a noticeable number of monsters or a main character, but not the ‘Toriel’ role. The Underground is demanding future fallen humans be hunted down, and the ‘Toriel’ role will react accordingly.
Captain of the Guard/Royal Scientist: Kill the ‘Toriel’ role. The ‘Undyne’ and/or ‘Alphys’ role will take over, and the Underground will try to encourage them to wage war on humanity.
Hotland Celebrity: Kill the ‘Toriel’, ‘Undyne’, and ‘Alphys’ roles. The ‘Mettaton’ role will take over, and their fans will rejoice. (note: the ‘Napstablook’ role will never take over)
Snowdin Sentry: Kill the ‘Toriel’, ‘Undyne’, ‘Alphys’, and ‘Mettaton’ roles. In desperation for leadership, the Underground looks to the ‘Papyrus’ role for guidance. The ‘Sans’ role may help as well.
Dog: Kill ONLY the ‘Toriel’, ‘Papyrus’, ‘Undyne’, ‘Alphys’, and ‘Mettaton’ roles. A dog takes over. Pretty much the same as in Undertale.
Leaderless: Kill those mentioned above as well as any other monster(s) but do not complete genocide. No one takes over, and everyone is left to cower in fear in the dark.
???: Somehow complete none of the above criteria but acquire a neutral ending. Just for error-handling.
Edit: Originally included Aborted Genocide ending but decided to just group it with the Leaderless ending.
