Unlocks stages, banners, and profile items otherwise tied to grinding or premium currency.
To get everything in Mortal Kombat 1 , you need: mortal kombat 1 dlc unlocker
If you want to avoid the risks of third-party software, there are several official ways to unlock characters, Kameos, and skins: How Do I Access My DLC Or Add-on Content? Unlocks stages, banners, and profile items otherwise tied