Downloading a pre-patched Budokai Tenkaichi 4 ISO from a website is because it includes the original, copyrighted game data from Budokai Tenkaichi 3 . Even if the mod itself is free and fan-made, distributing or downloading the full ISO without owning the base game violates intellectual property laws.
Usually, the team provides an "xDelta" patch. You will need a legal ISO of the original Dragon Ball Z: Budokai Tenkaichi 3 (USA or JP) to apply the patch and create your new BT4 ISO. Downloading a pre-patched Budokai Tenkaichi 4 ISO from
While many fans are searching for a , it is important to clarify a major piece of gaming history: there was never an official fourth entry released by Bandai Namco for the PlayStation 2. Downloading a pre-patched Budokai Tenkaichi 4 ISO from