If you have already beaten the game once, using a mod save to unlock the 4th Hokage or max out Killer Bee is not "cheating"—it is time management.
Using mod save data in Naruto Shippuden: Ultimate Ninja Impact offers several benefits, including: naruto shippuden ultimate ninja impact mod save data
Every character from base Naruto to Shippuden, including Edo Tensei characters. Maxed Stats: All characters at max level. If you have already beaten the game once,
: Launch the game and select "Load Game" from the main menu. For Real PSP Hardware : Launch the game and select "Load Game" from the main menu
Copy your extracted modded folder and paste it directly into the SAVEDATA directory. If prompted to overwrite existing files, click yes (back up your original save first if you want to keep it).
Essential if you are using texture mods or character replacement mods that require high-level save data to function correctly. How to Install Mod Save Data (PPSSPP - PC/Android)