The Faithless resource pack ported to Minecraft: New Nintendo 3DS Edition
Original resource pack by StitchSprites (https://linktr.ee/stitch.sprites)
Ported over to MC3DS with permission from the author
Extract the .zip file, grab the "atlas" folder and place it on this directory on your 3DS: luma/titles/[game id]/romfs/, where [game id] corresponds either one of these three values depending on what region your game is:
US (North American version) - 00040000001B8700
EU (European version) - 000400000017CA00
JP (Japanese version) - 000400000017FD00
NOTE: In order to transfer files from your PC to your 3DS, either insert the console's (micro)SD card into your computer, or use the FTPD homebrew application on your 3DS.