To get a "full" save for emulator, you typically need to import a completed memory card file from a PC or find a pre-configured save data folder. The "Full" Experience: What’s Included A complete save file for Tekken 5 usually unlocks: All Characters
There are two main ways to get these saves into your Android device: Method A: Direct Import (Easiest) save data tekken 5 aether sx2 full
I understand you're looking for (often spelled "Aether SX2" or similar). To get a "full" save for emulator, you