Codes alone aren't enough. You must configure Dolphin’s graphics to respect the new aspect ratio.
: Right-click Resident Evil 4 in your Dolphin game list, select Properties , and navigate to the Gecko Codes tab. resident evil 4 dolphin widescreen fix
If you cannot download the list, you can manually add this Gecko Code (Region Free / NTSC-U usually): Codes alone aren't enough
Pair the widescreen fix with Dolphin’s internal resolution upscaling (e.g., 1080p or 4K) and anisotropic filtering. The result is arguably the best-looking version of RE4 that isn’t a full remake. resident evil 4 dolphin widescreen fix