I have the config set to 16:9 for wii games, but there is slight letterboxing just short of 16:9. I'm getting this with both Sonic Unleashed and Colors. Is this intended behavior? I played through Sonic Colors on Dolphin maybe 5/6 years ago and don't remember this.
Most games are not exactly 4:3 or 16:9, so what you are seeing is all the pixels the game is trying to render. However, the game expects you not to see all of those due to overscan. If you want mimic overscan and fill your 16:9 display, enable Crop.
https://dolphin-emu.org/blog/2015/08/01/...rrorbender
Thanks, the bottom left image with Pikachu is exactly what I'm seeing. The last time I played through Sonic Colors was likely before the Pixel Aspect ratio feature was implemented.