Sorry but u have to buy the Silver Sword Starter pack. It's $2.99 in order to do this, and it is only for iOS sorry... again.
1 (If u want to): Close all aplications
2: Turn on airplane mode
3: Open mkx then press continue > Menu > Settings
4: Open control center then turn off airplane mode (It'll turn on wifi automatically)
5: It will reload for a second after that go back to Menu > Settings
6: Hit restore purchases as many times if u want (It might take a long time to press add to kollection after)
7: After ur done with hitting restore purchases in settings go to Store > Kombat Pack (Don't worry ur not gonna buy it) > Go to the setting on the left top corner > Menu on the top left corner
8: BOOM IT WORKS!!!! If it did ur welcome if it didn't try again