Many gamers confuse these two. Ultimate Ninja Impact is a PSP exclusive that plays similarly to Storm, featuring massive battles. Ultimate Ninja Storm 1 was a PS3 exclusive. However, fans have created ISO mods that convert Naruto Ultimate Ninja Heroes or Impact to feel like Storm 1.
Because the keyword "Naruto Ultimate Ninja Storm 1 PPSSPP" often leads to modified files, follow this safe road-map. Download Naruto Ultimate Ninja Storm 1 Ppsspp
If you own the original Naruto Shippuden: Ultimate Ninja Impact UMD, you can dump the ISO yourself using a custom firmware PSP. Alternatively, search for the official Naruto Shippuden: Ultimate Ninja Storm 3 ISO which is more readily available and looks stunning on PPSSPP. Many gamers confuse these two