Pre-Warzone Days
Commander Keen Clone

This strange clone in the hellish difficulty replaces the real commander Keen. Really annoying for players that expect an easy way to beat Grosse in Doom 2. When he dies he spawns a weak creature in his place. If you kill that weak creature he once again shows up. The only real way to kill him once and for all is to kill the clone and hope the real thing pops up instead of a weak monster, then kill Commander Keen to end the cycle of sheer stupidity.
Wolfenstein SS Clone

He is an clone that has triple health. When he dies he spawns spider imp heads in his place. Nothing special just a regular enemies with triple health introduced in hellish.
Beavis And Butt-Head

Those guys are TV icons from the 90's based off a TV show on MTV called "Beavis And Butt-Head". When that show first came on the air something was already special about as it became viral the first week it aired. There are even revival plans to revive these guys from the dead for more new episodes in the next upcoming decade where everything else is the same but they will comment on newer music videos so that would be something to look forward to. I have decided to revive these guys from the dead and turn them into supernatural monsters with very strong attacks you can not even begin to imagine.
Doomguy 2000

I am the very best most powerful monster ever within the game of Doom! I am a god nobody has a chance against me hell even 1,000 cyberdemons or 1,000 spidermasterminds couldn't take me down what makes you think you can kill me?
1337man

Not much is known about 1337man besides the fact that's he's the internet god. What you see in this picture of him looks like a demon. Nobody knows anything about his true forum on what he truly looks like. Many people talk about this "internet god" but we haven't seen him in person. Only the most powerful worthy people who pass all of his tests can truly face him in one final showdown. Be warned as he is extremely powerful and his attacks are very hard to dodge.
Original Game
Mini Archvile

Smaller weaker versions of their normal size counterparts have less health and the fire attack does less damage than the one used by the real archviles. Face them in groups and you will be in big trouble since they can revive themselves and other monsters that are able to be revived.
Mini Belphegor

These guys are smaller versions of the known Belphegor. Has much less health and is a weaker threat to the normal superior version.
Hissy

This icon of a creature makes it's special guest appearance in Doomguy's Warzone. Bascially a different smaller version of the cacodemon with 200 less health and is smaller. Don't let it's cuteness deceive you for one second since he packs the same punch as his bigger more realistic buddy known as the cacodemon.
Mini Mancubus

Nothing special with this one but do be careful when you face miniatures versions of the famed mancubus.
Mini Overlord

Just when you think that you would not ever see a smaller version of one of the newest monsters created in Doom. Well think again because they are for real and can pack quite a powerful punch if you are not careful.
Mini Queen

The last of these uninspired miniature monsters created from hell are here and the weakest of the newer monsters that came into the game during the 2000's not counting the original monsters that were here since day one.
Revemunk

These guys are the same size as termites by times 10. They have the same health as a zombieman but are very hard to hit because of how fast they move. The revemunks will fight along side the Chipmunk Baron in battle against the player. What's sad is that there is no redeeming value in killing them but if you don't soon enough then you will eventually die as the damage stacks to your demise.
Gold Edition
Giant Shotgun Guy

Oh my what do we have here? I never thought increasing the size of shotgun guy would be possible but it is. Say hello to the giant shotgun guy where he is smarter stronger and has more health. His giant shotgun has the power to kill players in one shot and to summon other fellow zombiemen that are just like him.
Sausage Lord

Information Unavailable.
Aldhivas

Information Unavailable.
Gardner Cacodemon

Information Unavailable.
?????

Information Unavailable.