Untiered Stuff

Aka-Oni - Strong but boring/glitchy (?)
Alen - Spriteswap of SF3 Alex, deemed too similar even with AI differences
Aluk - Spriteswap of SF3 Alex, deemed too similar even with AI differences
Angel Island Zone Sub Boss - Boring AI-breaking character
Archimonde - Strong but boring/glitchy (?)
Arrange Waddledee - Deals contact damage and breaks AI, boring otherwise
Bahamut SIN - Spriteswap of Red Dragon/Synn
BALAM - Strong but glitchy (?), was added straight to Untiered on request from Jor8a
Big Bang God Satoko - Spriteswap of Nightmare Sparkle (A newer version of Nightmare Sparkle is different in a number of ways but it's probably not worth to add it and put Satoko back on the roster)
Black - Spriteswap of Psyqhical
Code C: Yagevil - Older version of Wicked Yagami
D0 Magaki - Spriteswap (?)
Devil Adam - Spriteswap of MvC Apocalypse with inflated stats
Diabolic Fist Chagi - Untiered on editor's request (NOTE: Was still on roster at the time this was written)
Distant Land Rugal 2nd - Strong but glitchy (?), was added straight to Untiered on request from Jor8a
Dracula & Dragon - Boring AI breaker (and doesn't actually feature Dracula ZPC )
Dragon TD - Weird AI breaking gimmick character (?)
Element Kyo - Spriteswap of (presumed to be) Element-O
Erdrick, the Generic Anime Swordsman - Was to be deleted because of being unfunny and possibly stolen code, requested to be moved to Untiered on author's request
EX Rumia - Spriteswap of a Silvy character
FB Final Boss - Boring and hard to kill with zero killing power (?)
Final Zone Boss S1 - Boring and breaks AI
Giant Crab - AI breaking (?), somewhat boring to watch
GNG Lucifer - Stupidly hard to kill but has zero killing power in return, so fairly boring
God Nazrin - Spriteswap of Milotic (?)
Green Zone Boss RMX - Boring and breaks AI
Grey Pontiff BBB - Spriteswap of an unknown character
Hill Top Zone SP Boss - Boring and breaks AI
Hulk - Glitchy and broken version of The Incredible Hulk
Hydra TD - Weird AI breaking gimmick character (?)
Knuckles Custom - "excessive scamming and generally unfun" according to Roster Updates thread
Marble Garden Zone Boss - Boring and breaks AI
Marble Zone Boss - Boring and breaks AI
Master Mecha Sonic EX - Spriteswap of Super Saiyan 4 with inflated stats, improved version (edited by DS12) exists on the roster as Master Mecha Sonic
Mettaur - Incredibly cancerous version of Metool (?)
Mullah Abba - "rather pointless character" according to Roster Updates thread (???)
Mystic Cave Zone Boss - Boring and breaks AI
Nao the Fallen Killer - Strong but frequently crashes (?)
Necronomicon - Strong but frequently crashes
Neo Metal Sonic - Spriteswap of some Goku, improved version exists as KD Remilia Scarlet (spriteswap of NMS, edited by Below273 to be more unique)
Oni-Miko X - Strong but excessive lag
Oserotto - Boring "vehicle-type" character (think Ni-san or Hotaride) that frequently scams
PewDiePie - Spriteswap of Rikard
Rahab TD - Weird AI breaking gimmick character (?)
Rare Rage Rock - Spriteswap of Kappa
Rare Reimu - Spriteswap of Rare Akuma
Raw Jabba - AI patch that intentionally scams, was more of an experiment than anything
Reality Virus - Super strong but also super boring (?)
Rebekka - Spriteswap of some Hol Horse
Roaring Leona - Gimmick is waaaaay too finnicky to be placed in actual matchmaking
Robotnik Fire Machine - Boring and breaks AI
Seitei Sion - Spriteswap of S-Utsuho Reiuji
SHIMOYAKE - Less fair version of Will of "SHIMOYAKE" that ignores anything but basic attacks
Shishimai - Boring and breaks AI
SSJ4 Goku EX - Deemed too similar to SSJ4 Goku
Steve - Spriteswap of Super Mario 64 with inflated stats
STG Naruhodo - Spriteswap of STG Marisa (or one of the other STG Touhous)
Super Big Bird - Spriteswap of SSJ7 Kakarot with inflated stats
Super Dante - (Yeah I don't know about this one actually OpieOP )
Super Homer - Spriteswap of Nightmare the Jujin Lv3
Vegeta-ST - AI-less version of B-Vegeta (?)
Vegito EX - Deemed too similar to Vegito
W.D. Gaster - Strong but way, WAY too glitchy and also boring
Wheel of Fortune - Spriteswap of David Bell
Wrecker Ralph - Untiered on editor's request (NOTE: Was still on roster at the time this was written)
Zachael Type-S - Spriteswap of MTM-L
Zen Obron - Spriteswap of SF3 Akuma