Figured this could be for talk of updates, dlc, whatnots. Nothing here from me. I just didn't want to have to look at five different sources for this.


Hidden King of the Hill emotes:

#1 Point Down, Up, Y
"$%#&!" Up, Up, B
"FATALITY!" Up, Up, Right, Right, X
"FIGHT!" Left, Right, X
"Finish Him!" Left, Right, Left, Right, Y
"HA!" Down, Up, Down, A
"I'm Not Worthy" Down, Down, Y
Big Clap Right, Up, Y
Cheese Left, Up, Down, B
Cover Face Left, Right, B
Devil Horns Down, Up, X
Diamond Up, Down, Left, Y
Double Devil Horns Towards Screen. Up, Down, Y
Gather Ice Right, Right, Right, Left, Y
Hop Up, Up, X
Lighter Dpwn, Down, Up, Up, X
Point Right, Right, X
Raiden Pose Left, Left, Right, Right, X
Shake Head Left, Right, A
Sleep Down, Down, Down, B
Stink Wave Right, Left, B
Stretch Up, Down, Down, B
Throw Tomato Down, Down, Down, Up, A


VS Kombat Kodes:

Armless Kombat P1: 9-1-1 P2: 9-1-1
Blocking Disabled P1: 0-2-0 P2: 0-2-0
Breakers Disabled P1: 0-9-0 P2: 0-9-0
Dark Kombat P1: 0-2-2 P2: 0-2-2
Double Dash P1: 3-9-1 P2: 1-9-3
Dream Kombat P1: 2-2-2 P2: 5-5-5
Enhance Moves Disabled P1: 0-5-1 P2: 1-5-0
Explosive Kombat P1: 2-2-7 P2: 2-2-7
Foreground Objects Disabled P1: 0-0-1 P2: 0-0-1
Headless Kombat P1: 8-0-8 P2: 8-0-8
Health Recovery P1: 0-1-2 P2: 0-1-2
Hyper Fighting P1: 0-9-1 P2: 0-9-1
Invisible Kombat P1: 7-7-0 P2: 7-7-0
Jumping Disabled P1: 8-3-1 P2: 8-3-1
Klassik Music P1: 1-0-1 P2: 1-0-1
Kombos Disabled P1: 9-3-1 P2: 9-3-1
No Blood P1: 9-0-0 P2: 9-0-0
Player 1 Half Health P1: 2-2-0 P2: 0-0-0
Player 1 Quarter Health P1: 1-1-0 P2: 0-0-0
Player 2 Half Health P1: 0-0-0 P2: 2-2-0
Player 2 Quarter Health P1: 0-0-0 P2: 1-1-0
Power Bars Disabled P1: 4-0-4 P2: 4-0-4
Psycho Kombat P1: 7-0-7 P2: 7-0-7
Quick Uppercut Recovery P1: 3-0-3 P2: 3-0-3
Rainbow Kombat P1: 2-3-4 P2: 2-3-4
Random Phrase 1 P1: 7-1-7 P2: 3-1-3
Random Phrase 2 P1: 4-4-8 P2: 8-4-4
Random Phrase 3 P1: 1-2-2 P2: 2-2-1
Random Phrase 4 P1: 0-0-9 P2: 9-0-0
Random Phrase 5 P1: 5-5-0 P2: 0-5-5
Random Phrase 6 P1: 0-3-1 P2: 1-3-0
Random Phrase 7 P1: 2-8-2 P2: 2-8-2
Random Phrase 8 P1: 1-2-3 P2: 9-2-6
Sans Power P1: 0-4-4 P2: 4-4-0
Silent Kombat P1: 3-0-0 P2: 3-0-0
Specials Disabled P1: 7-3-1 P2: 7-3-1
Super Recovery P1: 1-2-3 P2: 1-2-3
Throwing Disabled P1: 1-0-0 P2: 1-0-0
Throwing Encouraged P1: 0-1-0 P2: 0-1-0
Tournament Mode P1: 1-1-1 P2: 1-1-1
Unlimited Super Meter P1: 4-6-6 P2: 4-6-6
Vampire Kombat P1: 4-2-4 P2: 4-2-4
X-Rays Disabled P1: 2-4-2 P2: 2-4-2
Zombie Kombat P1: 6-6-6 P2: 6-6-6


Hidden Battles:

Secret "Jade" Battle Get a double flawless victory and perform a fatality on Shang Tsung when battling against him.

Secret "Noob Saibot" Battle When you see Noob in "The Temple" stage's background win that battle without using the RT (Block) button.

Secret "Reptile" Battle On "The Pit 2 (Night)" stage wait until a shadowy figure flies across the moon, then get a double flawless victory and perform a stage fatality.

Secret "Smoke" Battle On "The Living Forest" stage wait until Smoke appears behind one of the trees. On that moment press Down + the "Back" button repeatedly.


Unlockables:

Mileena's Fleshpit Costume (Third costume) Complete the last level (Level 300) of the Challenge Tower.
Play as Cyber Sub-Zero Complete Chapter 13 in Story Mode. From then on he will be selectable on the Character Selection screen.
Play as Quan Chi Complete all chapters in Story Mode. From then on he will be selectable on the Character Selection screen.


Perform a Babality on a boss:

In order to use you Babality on Goro or Kintaro, you must be playing on Medium difficulty or higher and use you Babality on Shang Tsung, you must also have not lost a round, after you beat Goro or Kintaro you will automaticly use your Babality on them if you met the requirements. In order to use it on Shao Kahn, you must have used a Babality on everybody, including Goro or Kintaro.


Alternate Stage Soundtrack:

When selecting a stage in Versus Mode, press "START" and you will hear Shao Kahn laugh. Now the stage soundtrack will be replaced with a song from one of the previous Mortal Kombat titles. Does NOT work with: - The Courtyard (Night) - Desert - The Flesh Pits - Hell - Rooftop (Dusk) - Shao Kahn's Throne Room - Shang Tsung's Gardens - Shang Tsung's Gardens (Night) - The Bell Tower


Alternate color selection for costumes:

To select an alternate color for your character, go to the character select screen, then select your character by pressing Start, then press Start again on either costume 1 or 2 to get the corresponding alternative color.


Fight Goro:

After selecting character at Character select screen in Ladder Mode, hold down back button while selecting difficulty. The game will default to include Goro, rather than Kintaro in the boss fight.


Achievements:

A For Effort (10) Complete Tutorial Mode
Arcade Champion (40) Complete Arcade Ladder with All Fighters
Back In Time... (20) Complete Story Mode 100%
Best...Alternate...Ever! (10) Unlock Mileena's 3rd Alternate Costume
Block This! (10) Perform a 10-hit combo with any fighter
Brotherhood of Shadow (20) Discover and fight Hidden Kombatant 4 in Arcade Ladder
Cold Fusion (20) Unlock Hidden Fighter "Cyber Sub-Zero"
Complet-ality (10) Perform 1 of each type of "-ality"
Cyber Challenger (20) Complete 100 Online Matches
Dim Mak! (20) Complete all Test Your Strike mini-game challenges
Don't Jump! (10) Win A Ranked Online Match without jumping
e-X-cellent! (10) Successfully land every playable fighter's X-Ray attack
Fatality! (5) Perform a Fatality!
Finish Him? (10) Perform any fighter's hidden finishing move
Finish What You Start! (60) Perform a Fatality with all playable fighters
Halfway There! (5) Complete Story Mode 50%
Hide and Seek (10) Discover and fight Hidden Kombatant 2 in Arcade Ladder
Humiliation (10) Get a Flawless Victory in an Online Match
I "Might" Be the Strongest (20) Complete all Test Your Might mini-game challenges
I'm Not Dead Yet! (20) Comeback with under 10% health in an Online Ranked Match
Ladder Master (20) Complete Arcade Ladder on max difficulty without using a continue
License to Kill (20) Complete Fatality Trainer
Luck Be A Lady (10) Get all MK Dragons in Test Your Luck
My Kung Fu Is Strong (20) Gain Mastery of 1 Fighter
My Kung Fu Is Stronger (60) Gain Mastery of All Fighters
Outstanding! (60) Win 10 Ranked Online Matches in a row
Pit Master (10) Discover and fight Hidden Kombatant 3 in Arcade Ladder
Quan-Tease (20) Unlock Hidden Fighter "Quan Chi"
Robots Rule! (10) Win Arcade Tag Ladder with robot Sektor and Cyrax
Tag, You're It! (10) Perform and land a Tag Combo
The Competitor (30) Complete 200 Versus matches (online OR offline)
The Grappler (10) Perform every fighter's forward and backwards throws
The Krypt Keeper (20) Unlock 100% of the Krypt
There Can Be Only One! (20) Win 10 King of the Hill Matches in a row
There Will Be Blood! (40) Spill 10000 pints of blood
These Aren't My Glasses! (20) Complete all Test Your Sight mini-game challenges
Throws Are For Champs (20) Perform 8 throws in an Online Ranked Match
Tough Guy! (10) Win an Online Match
Tower Apprentice (10) Complete 25 Tower missions
Tower Master (20) Complete all Tower missions
Turtle! (20) Win both rounds with timer running out in an Online Ranked Match
Ultimate Humiliation (20) Perform every fighter's hidden finishing move
Ultimate Respect! (20) Earn 2500 Respect Points via King of the Hill Matches
Undertaker (20) Unlock 50% of the Krypt
Wavenet... (80) Win 100 total Online Matches
What Does This Button Do?? (10) Complete Arcade Ladder without blocking (allowed to continue)
Where's The Arcade? (10) Complete Arcade Ladder with Any Fighter
You Found Me! (10) Discover and fight Hidden Kombatant 1 in Arcade Ladder
You Will Learn Respect! (10) Earn 1000 Respect Points via King of the Hill Matches
You've Got Style! (20) Unlock all Alternate Costumes



Finally here is a quote of a post from x360a that has links to any question you could have:

Fatalities/X Rays
Complete Fatalities/Babalities FAQ
Will Fatalities In Trainer Count Toward My Achievements? No. They do not.
Unlocking Fatalities In The Moves Lists
Performing an X-Ray Attack

The Krypt
Full List of Krypt Content
What Can I Do With Koins After The Krypt?
Krypt Demon?

Achievements
Guide & Roadmap
Boosting "My Kung Fu Is Strong"
Secret Kombatants
Double Flawless Fatality on Shang Tsung (Jade)
Arcade Ladder Master
Luck Be A Lady
Challenge Tower Help
Online Boosting Methods
Boosting Ranked Matches
Respect Points Glitch
Arcade Champion

Gameplay
News on Patches
Picking an Alternate Costume
Rage Quitting
Will D/C Ruin My 10 Streak?
Multiplayer Lag

Miscellaneous
Any Australians With MK9?
Palette Swap Glitch
Brutalities?

I would like to add to the Classic Jade fight that you can't lose a round to anyone up to Shang Tsung either. On beginner, it's not that difficult at all, but it has to be done.

Also, if you lose a round to Shang it's all over. If you take a hit however, there's a little exploit. If you finish the match with him without losing a round, after you hear the announcer's "finish him" you can pause and go back to the character select screen without it adding a loss to your total.

I did this with Cyrax. Jumping into Shang Tsung and hitting X mid air followed by his simple x, x, x combo seemed to work majority of the time. The combo has a knock back on the last hit, and if you jump the second you can (just hold up and towards, as the Cyrax will jump as soon as he possibly can), Shang Tsung will usually get up but not block for some reason.

Also, you HAVE to fatality him as well. THEN you'll get the Jade fight.

Oh, and for Mileena's third alternate costume, you don't have to even beat the tower. Each challenge has a skip cost that you can pay. You can even pay to skip the 300th one. And I suggest you do just that.

Very useful post btw.

From Destructoid.com

If you play Mortal Kombat regularly, you've no doubt experienced, or at least heard of, the infamous "desynchronization error." The bug plagued players who decided to pick certain DLC costumes, alternate costumes and even some default costumes and caused their game to disconnect in the middle of the match, prompting the desynchronization error message. It happened to both consoles at one point, and then was later a problem only experienced on Xbox 360.

You can now resume playing and selecting those Klassic Kostumes without fear because NetherRealm has finally released an enormous patch that not only finally gets rid of that infuriating bug, but also fixes a grocery list of balancing issues for every single character and the game in general. You can find all the details of the patch below.

General Gameplay Fixes/Tweak

Fixed a couple of crash scenarios.
DLC billboards should now behave correctly on Xbox
You should no longer see online desyncs on Xbox that are related to alternate costumes or classic costume DLC packs.
MOTD handling and displaying code was tweaked.
Fixed a bug that could have resulted in tweakvars getting corrupted.
Fixed a crash in player select if you tried to exit out while the dlc box was open.
With the exception of Human Cyrax and Human Sektor, everyone's alternate costumes should behave the same as their primary costumes and have the exact same move properties.
You can now block after a dash forward is completed if it was cancelled into from a special move. Canceling out of a dash into another dash was normalized for most of the characters. Dash Block canceling remains the same.
Wakeup attacks should have better invulnerability on them if done in the first 4 frames of the wakeup window. (this was added as a hotfix tweakable value)
You no longer get a completely free throw attempt after someone blocks your jump punch. The opponent has less block hit frames but chained combos from a jump punch will remain the same.
There were several reactions that could freeze players just before they landed from attacks and reactions such as Kano's Airball and Cyrax's Net air reaction.
Made many minor hitbox adjustments.
Tweaked the negative edge window.
Several low attacks were being parried incorrectly.
Nightwolf and Kenshi can no longer still absorb a projectile if they get hit out of their enhanced reflects before the recovery frames start.

Baraka

Baraka's Blade Spin move starts up faster and is safer when blocked.
Baraka's Enhanced Blade Charge (Blade Rush) attack goes farther now.
Baraka's Chop Chop no longer auto corrects mid-move.
Baraka's has a new D1 low poke.

Cyber Subzero

Cyber Subzero can no longer handcuff certain characters by catching a wakeup attack with his enhanced Ice Parry.

Cyrax

Cyrax's Buzzsaw is an overhead block and safer when blocked
Cyrax's Bombs will no longer pop someone up who is in a 2nd Net reaction or in a Buzzsaw reaction.
Cyrax's mk3 costume should behave the same as the primary costume now.

Ermac

Ermac can no longer leave an invisible fireball collision around.
Fixed damage scaling a few of his reactions.

Jade

All of Jade's Enhanced Boomerangs (Reboomerang) will now return when the first hit is blocked.
Jade's Staff Grab is slightly safer when blocked.
Jade's U3 attack (Pole Vault) can be ducked.
Jade's 4,F3 kick (Polecat) is safer when blocked.

Jax

The armor on Jax's Enhanced Dash Punch (Dash Fist) and X-Ray (Briggs Bash) now starts instantly.
Added armor to the startup of Jax's Enhanced Elbow (Elite Smash).
Jax's projectiles (Energy Wave) recover a tiny bit faster.
Jax's towards 3 attack (Big Leg) is now an overhead.
Jax can no longer frame trap someone with his Gotcha Grab.

Johnny Cage

Johnny Cage's F3,2 (Take Two) no longer true combos into 2in1'd special moves
Johnny Cage's Nut Punch does slightly less damage.
Johnny Cage's sweep kick has less advantage on block or hit.

Kabal

Kabal can no longer leave an invisible fireball collision around.
Removed a couple unavoidable block traps with Kabal. (with F2 and 4)

Kano

If you don't charge and hold the Enhanced Kano Ball it will now keep its armor.
Kano's Enhanced Knife Toss recovers faster.

Kitana

Kitana's Fan reactions on an airborne opponent damage scale correctly now.
Kitana's X-Ray (Fan-Tastic) can no longer be reflected.

Kung Lao

Removed the pushback on Kunglao's spin when blocked.
Ground Hat now leaves both players at neutral when hit close and leaves Kung Lao at a disadvantage when blocked up close.
Kung Lao's overhead hat attack is slightly safer when blocked.

Liu Kang

Lui Kang's Parry now can correctly give a first hit bonus!

Nightwolf

Nightwolf's reflect should work better as a wakeup attack.

Noob

Noob's Teleport Slam should connect better with some opponents.
Noob should no longer be hit on the ground after he is up in the air for his teleport.
Noob's Shadow Charge hits overhead.

Quan Chi

Fixed an isse where Quan Chi's Skull Projectile (Skull Ball) could sometimes become invisible.
Added some armor to the Quan Chi's Enhanced Sky Drop (Sky Stomp).

Raiden

Raiden can no longer unavoidably frame trap someone with his Vicinity Blast.
Raiden has 2 additional recovery frames on his normal Teleport.
Raiden can't be hit during his Enhanced Teleport (Sparkport).

Reptile

Reptile whiffed Elbow Dash now builds slightly less meter.
Reptile is held slightly longer after knocking someone down with the Elbow Dash.
A blocked Reptile Elbow Dash no longer pushes back.
Reptile's Enhanced Slide (Slime Trail) now has armor on it.
Reptile can no longer leave an invisible Forceball collision around.

Scorpion

Scorpion's Leg Takedown is safer when blocked.
Scorpion's Enhanced Leg Takedown (Takeout) now has armor on it.

Sektor

Sektor can now 2in1 into the front and behind Up Missiles
Sektor's mk3 outfit should behave the same as the primary costume
Sektor's backjets will no longer get stuck firing, wasting precious fuel. (Yay!)
Sektor's X-Ray (Massive Missile) can no longer be reflected.

Shang Tsung

The armor on Shang's Enhanced Soul Steal now starts instantly
Shang Tsung's Enhanced Soul Steal (Soul Capture) activates faster.

Sheeva

Sheeva's Fireball is a mid block now and the Enhanced Fireball (Fire Blast) is an overhead.
Sheeva's Ground Pound can correctly give a first hit bonus!
Sheeva's Enhanced Jump Stomp (Jump Crush) now has armor on it.
Sheeva's Air Grab has better anti-air collision on it.

Sindel

Sindel can no longer leave behind an invisible fireball collision around.
Sindel's B1 attack is a low block.
Sindel's regular Scream is slightly faster nd the Enhanced Scream is a lot faster now.
Sindel's Scream (Yell) can no longer be parried.

Smoke

It's no longer possible to handcuff opponents with Smoke's Vibration (Shake) Parry.

Sonya

The armor on Sonya's cartwheel (Krazy Legs) lasts until the first collision and Archkick's (Arc Wave) armor lasts until her arch is almost over.
Sonya's 1,1,4 (Fierce Assault) no longer true combos into 2in1'd special moves from it.
Sonya's 3,1,4 (Beat Up) no longer true combos into 2in1'd special moves from it.

Stryker

Stryker's Enhanced Baton (Baton Bash) Sweep's 2nd hit is an overhead and is safer when blocked.
Stryker's Grenades recover slightly faster.
Stryker's Baton Roll starts up faster and the enhanced version has armor on it for a longer time.
Stryker's Grenade Toss and Baton Sweep do slightly more damage.
Stryker's B1,2,2 (Beatdown) combo is safer when blocked.

Sub Zero

Fixed some of the Ground Freeze reaction properties which were causing some other gameplay issues.
Sub Zero's Enhanced Slide (Power Slide) now has armor.
The opponent is frozen for 10 additional frames to allow him to at least get a slide in for some trade cases were he could get nothing before.

Freddy Krueger

Freddy's Nightmare Stance can't be repeated instantly anymore.
Fixed a bug where Freddy could get stuck being immune to projectiles.
Freddy forward and backward Teleports (Hell Shift) build slightly less meter.
Some of Freddy reactions were not damage scaling correctly.
Tweaked the recovery on some of Freddy specials.

Kenshi

Kenshi's X-Ray (Soul Blade) can no longer be reflected.
Kenshi is freed up sooner now when he absorbs a projectile with his (Blade Absorb)
Kenshi's F2,2,B1 (Absentminded) reaction no longer lets opponents be hit just as they hit the ground.

Skarlet

Skarlet has an additional 10 frames before she can cancel out of her normal dagger toss.
Skarlet can no longer 2in1 cancel out of her Slide attack from her Red Dash.
Skarlet's back throw now does normal damage.
Skarlet can do her U3 (Lifting Leg) attack from a dash now

Thanks for the update, bot. The game has been playing a lot better than it used to since the game auto-de-selects costumes until it's sure everyone has it.

And yet they still didn't fix the lag issue that's been there since day one.

I'm just glad they didn't nerf Smoke all that much.