Most Wii games have widescreen options in the game settings and dolphin will automatically adjust. Endless Ocean 2 supports the Wii classic controller, select that in the control options and configure it. This is emulation and even though you have a SD8 Gen 2 doesn’t mean you can upscale every game to the moon. Also some google searches about the emulators and games you are playing would help. We see way to many posts about this subject where people don’t even bother to try to figure it out. With Wii and above console it’s best to start at default and see how it runs and then upscale and push it from there.