For the most current and detailed information on USB Loader GX themes, especially those that might be released in 2025, I recommend:

9. Legal & security notes

Once you build your folder, pack it into a .theme file using the builder and share it on GBAtemp.

• Style: Dark Mode / Cyberpunk Neon.
• Why it’s the best: This theme has been updated specifically for 2025 to fix the "black screen on exit" bug present in older USB Loader GX revisions. It features electric blue highlights against a matte black carbon fiber background.
• Full Package Includes: Custom Wiimote cursor, 16:9 banners, and a matching boot sound.