Smoke Choked

The Wartorn arena from Newgrounds Rumble, Tankman's stage.
By joeythemarillfan
 

The first Melty Blood: Type Lumina character in M.U.G.E.N.!  Time to see how many servants he can destroy!
By Kira5472
 

Real suffering is unknown
By maymays4days and sonicboiforlife, edited by Zaobro4959
 

Brergrsart's old Vinesauce compilation fighting game, starring Uncle Joel, Bulk Bogan, some edited characters, and many characters that fit the Vinesauce aesthetic.
2nd File: Lifebar fix, if needed
By Brergrsart
 

Dude, that's creepy
By AngryBirdCooler

An edit of Gate of Hell's Ramlethal
By Gate of Hell+lexi

A mutant from the X-Men series who can create dimension-warping portals that can teleport people and objects, which is worked very well into her moveset in M.U.G.E.N.
By RobiWanKen0bi
 

The home stage of Noah Sharker, with his gang of thicc, captured, and slick furries.
By Squiddy62

An edit of Nanarman with voice lines from various Internet sources.
By Gaelik And Veanko, edited by Jankespro12

The complete collection of the TANKMEN series, plus TANKMEN INFINITY.  All of them are packaged as .swf files.
TANKMEN 1, 1.5, 2, and 5. by JohnnyUtah
TANKMEN INFINITY by Pikanjo
1st file: TANKMEN 1
2nd file: TANKMEN 1.5
3rd file: TANKMEN 2
4th file: TANKMEN .5
5th file: TANKMEN INFINITY

The hellish creature from the depths of nuke cheapies, based on a creation from NS, and fights to the instrumental of Ugh from Friday Night Funkin'.
By shirokuma, edited by Kuro Aonix
 

A really great take on Classic Sonic, newly released by DS12!
 

An edit of azu's D4 Asuka with A.I. and modern KOF effects in place of the original effects.
By ZETA

Yeah, that's literally her name.  Although she looks like a loli, she is the dominant boss of Kuma, hence her uncouth name.  She fights using a trick rope and by jumping all over the place.
By MoloMowChow
 

character bio
-------------
full name:  Angel Connelly
age:  13 years old
sex:  female
birthdate:  September 27
birthplace:  Scotland
height:  137 cm (4'6")
weight:  47 kg (104 pounds)
measurements:  69-67-89 cm
blood type:  O
job:  trainee
style:  ninjitsu
weapon:  bokken (wooden sword)
hobbies:  bicycling, exploring, studying
best sport:  acrobatics
favorite food:  rice crackers and seaweed soup
likes most:  freedom, nature
hates most:  bullying, unsportsmanlike conduct
treasured belonging:  her Masamune sword
personality:  curious, soft-hearted, sporting
unique powers:  aerokinesis, ceraunokinesis
alignment:  lawful good
goal:  to become an engineer
A freckle-faced tomboy with a gentle spirit, Angel is a proud and brave Scottish lass, brimming with confidence and energy.  Since Angel's hometown of Ainsley is a very remote and rustic community, the town functions as a nudist colony, and the populace only ever wears clothes when absolutely necessary.  As such, she was genuinely surprised to learn at eleven years of age that there are laws against public nudity in other parts of the world.
She believes that living in a world where everyone around her is happy is going to make her happy as well, and she intends to use any skills she possesses and whatever she can learn to achieve that goal.  Angel loves sports, and she holds honor in very high regard.
Her manner is that of a socially awkward rustic, but she spends a lot of her free time at the local library studying art and engineering.  As such, her deep understanding of architecture has taken even scholars by surprise, especially when the first thing they see is a fat little girl who clearly doesn't care about fashion sense in the slightest.
Angel is also a capable fighter -- tough and adaptable -- and despite her plump figure, she is also remarkably agile.  Her training in ninjitsu has made her effective and precise with a katana, but she prefers to use a bokken to prevent killing her foes.  She also has limited command of wind and lightning elements, which she uses in lieu of lethal weapons.
 
I found this character at random while uploading other files. And while I do have to say that the character herself is rather questionable, I gotta admire the solid gameplay, 5th or 4th division A.I., and the high quality sprites and animations!
By Muirtower
 

madoldcrow's self-insert, chock full of references, and is just as looney as the toons he makes characters out of!  He fights in a hoodie that makes expressions, like he does!
Quote from PlasmoidThunder:
By madoldcrow
 

Mayor, first I got into Smash, now I'm into this thing?  What was this tournament called, again?
One of the few versions of Isabelle available for M.U.G.E.N.
By Tyren, Austin, Omar, and Gameandwatch909

A not as well known stage by Andres Borghi

This is a modification of M.U.G.E.N. 1.1 that enables online play, and only online play.  Or at least, that's what it says on the tin.
In reality, this is an April Fool's 2019 M.U.G.E.N. build, containing only one character (Net Fu Man) and coding that crashes the game not too long after a match loads.
You can read more about it, here: https://mugen.fandom.com/wiki/N.E.T.G.E.N
By PlasmoidThunder

By Planeptune Arte
 

By Oyaji
Quoted from the M.U.G.E.N. Database:
 

Finally, an HD Among Us character!  However, he seems to have been edited from a CVS Scorpion, originally made by SeanAltly and ShinRei.
However, the sprites are very well aligned, so if I hadn't read the def file, it could have fooled me completely.
By Dan Hollandsworth

A very well known Yoshi OC, though he is not by Eggbomber101, as many believe.
He's a Yoshi with green magic, wings, and a good amount of counter moves.  This version, however, does not contain any vore moves.
By AngelJr2129 and Eggbomber101; Edited by EKZoroWarner

A source accurate Sigma from Mega Man X1, consisting solely of his first phase.  He has superarmor, and he fights with his lightsaber, forehead beams, and jumping on the walls.  Edited so he doesn't have his boss theme, just in case of copyright.
By Exclamation_Question
 

One of the main characters of Crimson Alive, formerly the antagonist of Genesis of The Heretic, the original installment of Crimson Alive.
By jade_midori
2nd file: AI patch by Holn