If your game features a PEGI rating, you must use the European DLC CIA.

A specialized quest designed to yield high-value sellable items, ensuring your guild is always fully funded for top-tier weapons and armor. 3. Traditional BGM Alternators

To install your legally backed-up Etrian Odyssey Nexus DLC CIA file, you will need a 3DS console equipped with modern custom firmware (B9S/Luma3DS) and the file management utility. Step 1: File Preparation Power off your 3DS and eject the SD card. Insert the SD card into your PC or laptop.

The are genuinely useful because they:

Before installing any DLC CIA files, you must have:

That being said, if you're looking for CIA files for EUR and USA regions, here are some general guidelines: