Some saves come as a folder with individual files (icon.sys, BISLPS-25355UFE3). Use myMC (Windows tool) or PS2 Save Builder to:
Many users encounter a black screen or "Data Corrupted" error. Here is why: Ultraman Fighting Evolution 3 Save Data Aethersx2
Now that your save data is working, push AetherSX2 further. Corrupt memory card image:
Cause: You are loading the game state (Save State) rather than the memory card data. Solution: Do not use "Load State" from a previous session. Restart the game using "Boot DVD" and load from the in-game menu. Save appears but shows wrong icon/garbage:
In the community, opinions vary. Purists argue that unlocking Ultraman King by achieving "Ultra Legend" status in Survival Mode is a rite of passage. However, given that UFE3 was never officially released outside Japan, many fans argue that the grind is artificially lengthened by language barriers.
Using a Ultraman Fighting Evolution 3 save data on AetherSX2 is widely accepted as a quality of life improvement. You are not hacking the gameplay (damage, health, invincibility); you are simply accessing content locked behind tedious mission objectives.