Character artwork during dialogue sequences receives a significant upscale, preserving the intricate design work of the original artists.

This is the most critical part for optimizing performance and visual quality. Open Dolphin, go to Graphics > Advanced and enable the following:

Locate a reputable Radiant Dawn HD texture pack from community forums like GBAtemp or GitHub.

How to pick a great HD texture pack

Fire Emblem Radiant Dawn HD Texture Pack – Better Edition

While there is no single "official" complete HD texture pack for Fire Emblem: Radiant Dawn

Because natively looks better than its predecessor, Path of Radiance , many players find that simply upscaling to 1080p or 4K in Dolphin's settings is sufficient. However, for a complete overhaul, look for these specific projects:

Using an HD texture pack significantly improves the visual experience of Fire Emblem: Radiant Dawn