Once you have a legitimate ISO, you may encounter slowdowns. Budokai Tenkaichi 3 is actually very light to emulate, but here are PCSX2 settings for smooth 60 FPS:
To play on PC, you need the PCSX2 emulator. Dragon Ball Z - Budokai Tenkaichi 3 Iso Download
Since the PlayStation 2 is a retro console, you will likely need an emulator to play this ISO file on modern hardware. Once you have a legitimate ISO, you may encounter slowdowns