A USB flash drive (FAT32 format).
No. There is no official tool or in-game import feature.
Whether you are grinding for that final God Speed support skill or just want to run one more 2v2 match as Gon vs. Toriko, protect your save data. The PS3 won’t last forever, but a 3 MB USB file can keep your Victory J-Stars burning for decades to come. Do you have a specific problem with your J-Stars save file? Check the Reddit communities at r/JStarsVictoryVS or the PS3 Homebrew subreddit for advanced save editing guides.
For fans of Weekly Shonen Jump, J-Stars Victory VS was a dream come true. Released in 2014 for the PlayStation 3 and PlayStation Vita (with a Western release as J-Stars Victory VS+ in 2015), this crossover fighting game brought together icons like Goku, Luffy, Naruto, and even less-represented characters like neurotic detective Neuro Nogami or the tragic Kenshiro.
The game prompt says "Save data is corrupted" or loads infinitely.