MK1- Scorpion
MK2- Kitana
MK3- Sindel
MK4- Quan Chi
MKDA- Li Mei
MKD- Ashrah

MK1-Sub-Zero
MK2-Kitana
MK3-Sindel
MK4-Tanya
MKDA-Mavado
MKD-Havok

MK1-Liu Kang
MK2-Baraka
MK3-Sektor/Cyrax
MK4-Quan Chi
MKDA-Frost
MKD-None they were all crap

MK1 - Kano
MK2 - Jax
MK3 - Stryker/Cyrax
MK4 - Fujin
MKDA - Kenshi
MKD - Darrius

MK1 - Raiden
MK2 - Smoke
MK3 - Sindel
MK4 - %DIVISION_BY_ZERO_ERROR%.................................

Click here to reboot

MK I Sub-Zero
MK II Kung Lao
MK 3 Cyrax
MK 4 Shinnok
MK DA Kenshi
MK D Noob-Smoke (if that dont count then Havik)

MK1 - Sub-zero
MK2 - Kitana
MK3 - Cyrax
MK4 - Tanya/Reiko
MKDA - Nitara/Frost
MKD - Havik

MK1-Sub-Zero
MK2-Smoke, but if he dosen't count cause you can't play as him, then Reptile.
MK3-Cyrax
UMK3-Noob Saibot
MKT-Human Smoke, Chameleon if it has to be newly introduced
MK4-Hmm..Probably Fujin
MK:DA-Frost
MK:D-Noob-Smoke, or Raiden if he counts

MK2 - Kitana
MK3 - Kabal
MK4 - Tanya
MKDA - Kenshi
MKD - I'm not sure

MK1: Subzero
Mk2:baraka
MK3:Cyrax/Sextor/Smoke hehe
UMK:Ermac/Noob Saibot
MK4:rai or reikko
MKG: is kung lao
MKDA:Frost
MKD: Havik and Ermac

He's not asking for the best characters, he's asking for the best introduced in each game.

Kung Lao was introduced in MK2, and Ermac wasn't introduced in MKD.

Ermac was a playable character in both UMK3 and MKT.

Anyway here is my opinion:

MK1: Sub Zero
MK2: Kitana
MK3: Sindel
MK4: Fujin
MKDA: Nitara
MKD: Havik
'Side' Games: Sareena (Introduced in MKM:SZ)

MK1: Sub Zero
MK2: baraka/ Kung Lao
MK3: Cyrax
MK4: Quan Chi
MKDA: Kenshi
MKD: Havik

MK - Sonya
MK2 - Mileena
MK3 - Sindel
MK4 - Tanya
MK DA - Nitara
MD D - Ashrah

That turned out quite nicely actually. ^.^!

MK-Raiden *grin*
MK2-Kung Lao
U/MK3-Sindel
MK4-Fujin (I know not really introduced in this game but in MK:MSZ but was the first time he was playable)
MK:DA-Nitara
MK:D-Ashra (sp?)

MK1-Reptile
MK2-Mileena
MK3-Sektor
MK4-Reiko
MKDA-Li Mei
MKTE-Sareena
MKD-Havik

mk1 sub-zero
mk2 female ninjas (kitana, mileena, jade)
mk3 cyborg ninjas (cyrax, smoke, sector)
mk4 rekio
mkda frost
mkd dark raiden

mk1=raiden

mk2=reptile or kitana

mk3=Kabal

mku=ermac

mkt= shao kahn or rain(i know heis not new)

mk4= obviously my fav character, Shinnok

mkg= kung lao( again, he's not new)

mkda=nitara or drahmin

mkd=hotaru

mka= Taven

Ooh! Good poll.

MK1: At that point, probably Scorp, considering he was the only one with a substantial story at that point. Raiden isn't bad either at that stage, though. And a sorceror who devours souls is always cool. Argh - my head says Scorp; my inner geek says Shang. I can't decide.

MK2: Kitana and Mileena. I refuse to choose one, as they're so intertwined in this game. Pretty stiff competition in this title, though - Kung Lao, Shao Kahn, Jax, Baraka...

MK3: Kabal, I guess; he has a decent backstory. Kinda slim pickings here. The robo-ninjas were always supremely goofy to me.

MK4: And again with the slim pickings. Fujin, though he's not that well used here. Quan Chi didn't get that good until Deadly Alliance - he just looks too much like an evil mime in previous incarnations.

MK:DA: Another great title for new characters - Frost, Kenshi, Nitara, Li Mei. Mavado's my favorite, though, presenting a different, more cunning threat for the Special Forces.

MK:D Hmmm. Y'know, Deception did a great job of reinventing old, dormant characters, but the new ones don't hold up to the MK2 and DA crops. I'm gonna say Ashrah. The Order/Chaos story has potential but, at this point, little development and no absolute standouts.

1 Cage

2 mmm, They were all good, but I feel I have to slide with Lao. Though Meelina is a close 2nd.

3, Styrker. Yep, I a pretty big fan of his. Kabal is number 2 of couse.

4. Maybe Jarek Or Kai. But I wish I can add in Quan Chi, if it were not for MKM. But he did show up first in a fighting game lol.

5DA, Kensi hands down, imo. Frost and Dramin make a close 2nd.

6, Kira. Imo. Havik is 2nd of couse.

MK7. MM Traven??? maybe lol.

MK: Kano
MK2: Reptile
MK3: Kabal
UMK3: Jade
MKT: Sektor
MK4: Quan Chi
MKG: Mileena
MKDA: Frost
MKD: Kira
MKSM: Sub-Zero
MKA: Kabal

These characters are in my opinion the best new characters in each game. I only took in account "new" characters from each game, meaning if the character appeared in a previous game they were not new.

MK- Scorpion
MK2- Barakka
MK3- Cyrax
UMK3- Ermak
MK4- Reikko
MKDA- Kenshi
MKD- Zombie Liu Kang
MKA- chemeleon

MK= Reptile (although unplayable)
MK2= Noob (once again unplayable)
MK3= Stryker
UMK3= Ermac
MKT= Human Smoke
MK4= Fujin
MKG: Sector
MKDA= Frost
MKD= Dark Raiden
MKA: Chameleon

I'm not doing UMK, MKG or MKT because they are all basically the same with their counterparts.
MK1: Scorpion
MK2: Kung Lao
MK3: Sektor
MK4: Fujin
MKDA: Frost
MKD: Onaga (even though he wasn't playable)