Mortal Kombat: Deception Cheats

In Konquest Mode, The "Walk on Air" glitch can be performed at any time in the Orderrealm. Go to the outermost walkway in H-5, and hug the invisible barrier while you change from H-5 to H-6. You'll end up being able to walk on the air, and even go out where you can't go. This sends you into "Negative Space", or area -1

There's an old man in Edenia (Coordinates E-8, inside a house) that wil give you 500 Platinum koins if you bring him a necklace found from a dead body in G1. (Outside of the castle)
You can keep getting a necklace and giving it to the old man and he will keep rewarding you.

In the realm or order, you will find Mavado. When you speak to him, he will ask to exchange coins. Speak to him again, he gives you the coins in exchange for the ones he wants. Well, if you keep going back to him, he gives you more sapphire coins everytime.

Choose Scorpion as any character and select Beetle Lair stage. Stand toward your opponent with the stain glass between the two and use the spear with opponent blocking. He will be tethered to Scorpion until any damage is taken.

Pick Liu Kang as your fighter and face Shujinko. Perform Fatality 2 on Shujinko. When the Fatality is finished, there will be no head at all.

NOTE: This only works when you fight against Shujinko.

Set the difficulty level of Puzzle Kombat to "Novice" and set the difficulty of regular kombat (CPU Difficulty) to "Max". Play Puzzle kombat, the difficulty will be low, but the rewards will be for the higher difficulty.