Calling That Detestable Name, from the Etrian Odyssey 3 OST. Replaces bgm_crs2_19_vs_darz1.nus3audio (in-game: Dharkon)
Added a standard quality version that must be installed using the "Ultimate Music Replacement Mod" Skyline plugin. Drag and drop the extracted folder into the root of the SD card and it should add the file to the correct directory.
Music Mod for Smash Bros. Ultimate