You need two things:
Here is the breakdown of what this "BT4" project is and how people typically access it: 1. The Fan-Made "Budokai Tenkaichi 4" This is a massive overhaul of the original PS2 game Budokai Tenkaichi 3 . Created by , it adds characters from Dragon Ball Super , updated mechanics, and new story arcs. The PS2 Version: The primary mod is designed for the (PS2) emulator. The Dolphin Version: Because the original Tenkaichi 3 --- Download Dragon Ball Z Budokai Tenkaichi 4 For Dolphin
The character select screen shows "SSJ3 Goku" but the model looks like a glitched mess. Solution: The Dolphin mod might be for an older version of BT4. You need to download the specific "Dolphin Conversion" pack, not the standard PS2 patch. You need two things: Here is the breakdown