It sounds like you're looking for a guide to get high-quality / custom textures for Naruto Shippuden: Ultimate Ninja Storm 5 (if it existed on PPSSPP) or for Naruto Shippuden: Ultimate Ninja Impact / Storm 4 mods on PPSSPP.
It is a mod, not a new engine; mechanics can feel repetitive. Highly portable; runs on Android via PPSSPP. naruto shippuden ultimate ninja storm 5 ppsspp texture top
HD Character Models: Replaces standard textures with upscaled or completely new skins, often inspired by Storm Connections or Storm 4. It sounds like you're looking for a guide
Settings → Graphics → Rendering Resolution → set to 2x or 3x PSP (or custom 1080p+).Experience the ultimate shinobi revolution on your handheld! The Naruto Shippuden: Ultimate Ninja Storm 5 Emulator: Download the latest version of PPSSPP from
4K Capability: When played on Android or PC via PPSSPP, these mods can be upscaled to 4K resolution, making the cel-shaded art style look surprisingly modern.
The latest texture mods focus on realism and modernized interface elements to enhance the handheld experience: