Monster Hunter 4 Ultimate 3ds Save Editor Fix -

: A modern GitHub-based editor that handles automatic decryption and re-encryption of save files. It includes modules for item boxes, equipment boxes, and experimental guild quest and Palico editing. MH4U-Editor (by mikewii)

The gold standard of the MH4U modding world is the (often referred to simply as "APM"). Monster Hunter 4 Ultimate 3ds Save Editor