I think its safe to assume Mokap is one of the "unpopular" characters, probably Meat as well.

Hsu Hao and Kira.

Basicly every new character after MK4 and some from MK4.

< a href="http://mortalkombat.wikia.com/wiki/Mortal_Kombat_%282011_video_game%29">Mortal Kombat Wiki

Pretty much everyone created after MK3 was unpopular. There are a few exceptions of course.

What about Havik, Li Mei and Ashrah? My first Mk was Deception and I loved these 3, especially Havik and his Chaosrealm^^

Mokap

Ya I admit I did like the originality of those characters I wish the mk team would have had more time to have developed these characters but obviously they were rushed when they were with midway, the only characters I hated were Hsu Hao,Mavado,Kobra,Kira and any other character who used the same moves as another! and MK4 characters (epically Quan Chi)

My least favorite character was Dairou. I HATED that little elf dude. I think he actually played pretty well, but he just looked stupid. I actually liked Hsu Hao, especially his fatality. You might could say I even liked him more than *gasp* Kano.

We want Havik, he was full of win. Seriously his fatalities were so original and cool looking.

Technically, they gave him Quan Chi's Leg beat fatality, only Havik knocked their head off instead of beating them to death, lol.

Dairou, and Darrius are the most unpopular characters imo.

From what I read around the forums, it looks like people seem to think Dairou and Darrius can be salvaged if they stick to their original concepts of the rogue samurai and Red Dragon member respectively.

I agree with that idea.

In my time here, I've seen many fanboys of different characters. Here is how I'd estimate the popularity of the characters based on what I've seen:

God Tier
Sub-Zero
Raiden
Scorpion

Top Tier
Other male ninjas besides Rain
Sonya
Kitana
Shang Tsung

High Mid Tier
Kung Lao
Jade
Mileena
Kano
Kabal
Baraka
Shao Kahn

Mid Tier
Liu Kang
Quan Chi
Sektor
Jax
Sindel
Johnny Cage
Rain
Kenshi

Low Mid Tier
Stryker
Cyrax
Nightwolf
Havik
Goro
Shinnok

Low Tier
Most new characters from MKDA and MKD
Kintaro
Motaro
Tanya
Fujin
Daegon

Bottom Tier
Everyone else from MK4
Chameleon
Khameleon
Sheeva
Kira
Kobra
Taven

Mistake Tier
Shujinko
Mokap

LOL Tier
Hsu Hao

Really? I hope they never come back. Along with Hsu Hao, Moloch and Shujinko those are my most hated characters.

how bout hotaru. he is one of my least favorites. the only characters after 3 i thought were any good were reiko,havik (only cuz i liked his hooded alternate costume), fujin, kenshi, and blaze.

I can't believe we have a LOL Tier, lol.

The MK Wiki is largely full of shit and conjecture.

That said, the MK4 cast is hit and miss in terms of popularity - Tanya and Quan Chi have loads of fans, Fujin and Reiko seem to have a moderate amount, Shinnok is liked more as a plot character and generally thought poorly of in terms of gameplay, and I think a guy I know named Buck who lives a few doors down said he liked Jarek once. He may have been saying 'Jerky'. I dunno.

It's once you get into the 3D games that things really start dipping. There are very few characters who don't have a small fanbase, but almost everyone is shit on to some extent with the exception of Kenshi, who pretty much everyone fell in love with from day one.

there were alot of generic characters from the 3D MKs, i would say almost all of the ones created for those games.

the few i liked were Kenshi, Bo Rai Cho, Frost, Fujin, Kobra, Kira, and Reiko(MK4 maskless ninja looking version).

Darrius, Sareena, Li Mei, Nitara, Dairou, and Kai could be reworked to fit the MK mythology better and actually be great characters. They're just half-ass as they are though.

The below are my unpopular characters in random order:

Males:
---------

Chameleon
Dairou
Jarek
Darrius
Hotaru
Mokap
Kai
Shunjinko
Kobra
Taven
Daegon
Havik
Meat

Females:
-------------

Kira
Sareena
Khameleon

(Sub)Bosses:
-------------------

Moloch
Blaze

why so much shujinko hate!/ personally he was my favorite character in MKA aswell as havik

I wouldn't mind seeing Shujinko in a future game, just not as foolish as he was portrayed in Deception. He's supposed to be an old wise man. He's the Pai Mei of MK.