You cannot burn this to a disc for a real PS2 easily (and modding your PS2 is complex). Use the PCSX2 Emulator.
The easiest way to play this today is via the PCSX2 emulator, which upscales the graphics to HD. Download Naruto Ultimate Ninja 6 Ps2 Iso
If you are seeking new Naruto fighting game content, consider: You cannot burn this to a disc for
If you obtain a clean Ultimate Ninja 5 ISO, here is how it runs on modern hardware via PCSX2 (v1.7+): The easiest way to play this today is