If the game doesn't load, ensure it is "Decrypted" (the file name "DecrTD" suggests it already is). Handling the Japanese Language Super Robot Taisen UX was only released in Japan.
Your 3DS must have like Luma3DS installed. SRTUX-JPN-DecrTD-Ziperto.rar
Depending on how you plan to play, you will need a specific format: If the game doesn't load, ensure it is
You typically need the .cia format to install it to your home menu. 3. Playing on a 3DS Console (CFW Required) If the game doesn't load
If the archive fails to extract, the download may be incomplete. Try a different mirror link from the source site.