Modding your 3DS is incredibly easy in 2025 and opens the doors to doing so many cool things! Downloading games, custom themes, ROM hacks, this is just the beginning. A windows computer is needed, along with an SD card + adapter.
What you'll need ⬇️
MSET9: https://github.com/hacks-guide/MSET9/releases/download/v2.0/MSET9-v2.0.zip OR https://github.com/hacks-guide/MSET9/releases/latest
Python: https://apps.microsoft.com/detail/9nrwmjp3717k?hl=en-US&gl=US
x_finalize_helper.firm: https://github.com/hacks-guide/finalize/releases/latest/download/x_finalize_helper.firm
finalize.romfs: https://github.com/hacks-guide/finalize/releases/latest/download/finalize.romfs
(OPTIONAL) 3ds Themes: https://themeplaza.art/themes?sort=most-downloaded
SD Card larger than 32GB? Use this to format it: https://www.sdcard.org/downloads/formatter/sd-memory-card-formatter-for-windows-download/
Thanks https://3ds.hacks.guide/
Tags: nintendo 3ds, mod 3ds, 3ds cfw, 3ds custom firmware, hack 3ds, hshop, mod your 3ds, modded 3ds