Ermac:We are many you are but one.

Smoke:where there is smoke there is fire.

I kind of find it ironic when Smoke says "where there is smoke there is fire" and then he gets burned by Scorpion's fire blast.

"Others pursue. I find."

- Mileena

we share blood, but we are not brothers

-NOOB

I like a lot of the ones that have been mentioned so far, but here's one that hasn't:

Mileena (giggles wickedly): Let's dance!


Oh, and this exchange between Liu Kang and Kung Lao is priceless:

Kung Lao: Looking for your girlfriend?
Liu Kang: I'm pretending to ignore you.

Love Jade's "This will be easy" intro and Mileena's scare win pose

Forgot this one by Shao Kahn:

"It's official. You suck!"

MKvsDC Shang performing a fire skull from above or below: MUHAMMED ALI !!

Sektor- I will show no mercy!

Cyrax: "I'll Kill You If I Have Too".

Dan Forden: Toasty!

OOOOOOh ,ill play along, ill play along!!

Scorpion: "I DEMAND SUB ZERO!!"
Shang: "YOU WILL DEMAND NOTHING!!!"
-----
ooo and these ones,

Scorp: "I will have my revenge, but i will not kill Sub Zero"
Bi han: "...'will' not...or CAN NOT! " (NICE Entrance)
-----
Bi han: "To HELL with your clan"
Scorp: "no...TO HELL WITH YOU!!"
-----
kitana
Liu kang: "i hope we meet again under...different circumstances"
Kitana:
------
Kung Lao: "Nevermind the Lin Kuei, now you face a shaolin!"
------
Shang: "fighting with scorpion, the sorcerer Quan Chi!!"
Scorp: "You have already lost..."
Liu Kang * shits pants
------
Jax: "Damn you Ugly! "
------
Johnny: "Fans think my moves are all wire work and special effects, truth is...i AM the special effect"
------
Johnny: Oh YEAH
------
Smoke: "Where theres SMOKE theres FIRE!"
------
Sub Zero: "Be Stealthful as the Night..."
Smoke: "...and Deadly as the Dawn"
------
Kitana: "The Emperor was wise to send me here, the Lin Kuei DO walk uninvited in his realm..."
Smoke: "Wise though your emperper might be, he was foolish to send his HOUSEMAID to interfere in Lin kuei business..."
Kitana: "I am KITANA, PRINCESS OF OUTWORLD, and i deal harshly with sharp tounged intruders!" (gets ass whooped)
Smoke: "Sleep well, princess"
-------
Ermac: "We will break you as well"
Sub Zero: "Not if i break you first..."
-------
Mileena: "Come let us be a FAMILY!"
Kitana: "you are not my family, YOU ARE A MONSTROSITY"
-------
Kitana: "i felt that you should know what shang tsung has been doing as of late, this conjuror has created horrid replicas of me! Crossbred with tarkatan blood! One was alive, and attacked me!"

Shao khan: "....................................................Well Done, Sorceror"
Kitana: *WTF!?
-------
Jade: "Blind loyalty is not a good thing as i have learned, you must keep your eyes open to anticipate the finishing blow..."
Baraka: "WTF-ooufff"
Jade: "You make it too easy"
------
Sheeva: "NO ONE IS ALLOWED IN THE TOWER!!"
Jade: "As you can see, i am here..."
------
Jade: "That should distance me from any persuers..."
*mileena's nice entrance
Mileena: "OTHERS persue, I find..."
Jade: "By the gods, you are mileena" (no shit...)
Mileena: "You must return with me, theres to be a celebration for my Sister....shee's going awaaay..."
------
Johnny: "What's Raiden got that i havent got?"
Liu: "...godlike power?"
Kung" "a personality that is not at all like sanding paper?"
johnny: "jerks..."
Shaolin monks: * giggles
------
Kung Lao: "I hope your girlfriend is worth lord raiden's anger Liu kang"
Liu: "notice i am ignoring you..."
------
Quan Chi: "No earthrealm BOY can stop this Deadly Alliance..."
------
Kung Lao: "You see Raiden, Earthrealm is F- *SNAP
Raiden: "KUNG LAO!!"
Liu Kang: "NOOOO!!"
Raiden: "I WILL RIP THE FLESH FROM YOUR BONE!!!" (DAMMIT LIU, You should have let him do it! i was pissed!)
-------
Kabal: *sees mileena, "So what do you think, Friend or Hoe?"
Stryker: "Hoe"
Kabal: "Dressed like that?"
Stryker: "DEFINITLY HOE" hahahahaha
------
Stryker: "Is johnny cage fighting a giant mosnter?, what is this 'TIME SMASHERS'!?"
------
Kintaro: "HUMANS, LESS UGLY WHEN THEY BURN!"
------
Stryker: "POLICE BRUTALITY!"
------
Cyber Sub Zero: "My SOUL was corrupted, and now it is cleansed!"
------
Noob: "you, You are not worthy of the name Sub Zero
CSZ: "Who are you to judge?
Noob: "I wore those colors before you..."
CSZ: "BI HAN!??
Noob: "Yes Kuai Liang, it is I, Quan Chi has restored me
CSZ: "you and i...we are flawed copies of our former selves"
Noob: "I have no flaws, Quan chi has perfected me"
CSZ: "Brother-
Noob: "We share blood, but we are NOT brothers..."
CSZ: "Then i will not regret you defeat!"
------
Sektor: "You are weak smoke!"
------
Sindel: "Come forward if you dare, i will finish what the Lin Kuei could not!"
Jax: "Lets do this"
Nighwolf: "ATTACK!"
(sindel kills most)
------
Kitana: "....liu kang...
Liu: "KITANA!
kitana: "liu kang...you were right, i wish we had met...under different circumstances...."
Liu: "...kitana..."
*kitana dies
------
Liu Kang- "you have gone MAD raiden..."
------
Shao Kahn: "TODAY, I BECOME 'THE' ELDER GOD!!
------
Shinnok: "Soon i will be free, Earthrealm and Outworld will be ours..."
------
Skarlet: "Raauh"
------
Johnny: "C'mon..."
------
Liu Kang: "Show me what you can do..." (that only looks and sounds right when i face Kitana, or another mk female...)
------
Freddy Krueger: "shhhhhh" hahahaha
------
Jade: "This will be easy"
------
Johnny: uh, Rai-dude..."
------
Shao Kahn: "I AM SHAO KAHN! CONQUEOR OF WORLDS! You will taste No Victory!"
Liu Kang: "You will taste your own Blood!"
------

and my ALL TIME FAVORITE from MK9!!! .....

Dark Raiden: "HE Must Win...

Ooooo and this one

Bi Han: "THAT WAS NOT ME!"
Scorpion:

(TOASTY!!)

My favorite will always be Shao Kahns victory shriek in Mortal Kombat Deception: EEERRRREEEEEHHHH!!!! Lol!

Then Noob-Smoke win stance lol.

Jax: GOTCHA!

Johnny's X'ray!

Love Johnny's little occasional 'Don't Hate'.

She's going awaaaaay...

The full dialogue:

Mileena: Lettuce Dance!

I see no vegetables but its quite memorable.