Here is a quick video to showcase the ideal RG350/RG350M display settings for your Game Boy Advance games within the ReGBA emulator. In a nutshell, you’ll want to set the display scaling to “hardware”, remove any forced sharpening, and adjust the aspect ratio by pressing START + A. And be sure to grab the most updated emulator available on my home console and handheld guide. Enjoy!
Retro Game Corps 
This was incredibly helpful, thank you. These key combos aren’t really obvious, but they make the image look great.
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