-------------- underfell -------------
U.F. Frisk
U.F. Chara
U.F. Flowey
U.F. Toriel
U.F. Sans
U.F. Papyurs
U.F. Undyne
U.F. Nabstablook
U.F. Alphys
U.F. Mettaton
U.F. Asgore
-------------outertale -----------
O.T. Frisk
O.T. Chara
O.T. Flowey
O.T. Toriel
O.T. Sans
O.T. Papyurs
O.T. Undyne
O.T. Nabstablook
O.T. Alphys
O.T. Mettaton
O.T. Asgore
----------- Dancetale --------
D.T. Frisk
D.T. Chara
D.T. Flowey
D.T. Toriel
D.T. Sans
D.T. Papyurs
D.T. Undyne
D.T. Nabstablook
D.T. Alphys
D.T. Mettaton
D.T. Asgore
------- Underlust -------
U.L. Frisk
U.L. Chara
U.L. Flowey
U.L. Toriel
U.L. Sans
U.L. Papyurs
U.L. Undyne
U.L. Nabstablook
U.L. Alphys
U.L. Mettaton
U.L. Asgore
--------- Underswamp -------
U.S. Frisk
U.S. chara
U.S. flowey
U.S. toriel
U.S. sans
U.S. papyurs
U.S. undyne
U.S. nabstablook
U.S. alphys
U.S. Mettaton
U.S. Asgore
--------- Humantale --------11
H.T. Frisk
H.T. chara
H.T. flowey
H.T toriel
H.T. sans
H.T. papyurs
H.T. undyne
H.T.Nabstablook
H.T. alphys
H.T.mettaton
H.T. Asgore
--------- Reapertale --------
R.T. frisk
R.T. chara
R.T. flowey
R.T. toriel
R.T. sans
R.T. papyurs
R.T. undyne
R.T. Nabstablook
R.T. alphys
R.T. mettaton
R.T. asgore
-------- Gendertale ---------
G.T. frisk
G.T. chara
G.T.flowey
G.T toriel.
G.T. sans
G.T. papyurs
G.T. undyne
G.T. Nabstablook
G.T. alphys
G.T. mettaton
G.T. asgore
---------- Aftertale ----------
A.T. frisk
A.T.chara
A.T.flowey
A.T.Toriel
A.T.sans
A.T.papyurs
A.T.undyne
A.T.Nabstablook
A.T.alphys
A.T.mettaton
A.T. asgore
--------- fresh tale -------
F.T.frisk
F.T.chara
F.T.flowey
F.T.toriel
F.T.sans
F.T.papyurs
F.T.undyne
F.T.Nabstablook
F.T.alphys
F.T.mettaton
F.T.asgore
--------- inktale ------
I.T. frisk
I.T.chara
I.T.flowey
I.T. toriel
I.T. sans
I.T. papyurs
I.T. undyne
I.T.Nabstablook
I.T.alphys
I.T.mettaton
I.T.asgore
------- errortale ---------
E.T.frisk
E.T.chara
E.T.fowey
E.T.toriel
E.T.sans
E.T.papyurs
E.T.undyne
E.T.Nabstablook
E.T.alphys
E.T.mettaton
E.T.asgore
------ angeltale--------
A.T.frisk
A.T.Chara
A.T.flowey
A.T.toriel
A.T.sans
A,T.papyurs
A.T.undyne
A.T.Nabstablook
A.Talphys
A.T.mettaton
A.T.asgore
-------------

Ahhhhhhhh! That took forever!!!!!! I'm to lazy to write the others so I will write this down! ⬇⬇⬇⬇⬇⬇⬇⬇⬇⬇⬇⬇⬇ ( I for get what some of them are called so I might write the short name for it like U.S. FRISK. And I might spell somethings wrong)

Underkeep

Understeem

Mafiatale!

Adultale ⬅⬅⬅⬅⬅⬅⬅ ( don't ask were I got that name!!!)