: These ISOs are typically modified versions of Naruto Shippuden: Ultimate Ninja Impact , which was the most advanced Naruto title released for the PSP.
: Modders use "Texture Packs" to change the UI, menus, and character models to mimic the aesthetics of the Storm series. Character Rosters
These modified versions were eventually packed into the ISO files you find today. When you play it on the PPSSPP emulator, you are technically playing a heavily modded version of Ultimate Ninja Impact or Ultimate Ninja Heroes 3 designed to look like its big brother on the PS3.
What you will find in the community are "Storm 2" modpacks. These mods use a base PSP game and overhaul it to mimic the Storm 2 experience: : Most often built on Naruto Shippuden: Ultimate Ninja Impact Naruto Shippuden: Legends: Akatsuki Rising Mod Features : These include custom Texture Packs to change character models, updated to look like the Storm series, and modified to unlock all characters.
Modders often add characters or skins from later games, such as Sage Mode Naruto or Pain (Yahiko).