In the 3D version, you save by interacting with Owl Statues or Quill Statues .
This fan patch is highly recommended as it restores original N64 features, such as faster Zora swimming and Deku hopping mechanics, while keeping the 3D version's improved graphics. The Legend of Zelda: Majora’s Mask 3D ROM & 3DS...
Collecting these in dungeons provides permanent health or magic upgrades. In the 3D version, you save by interacting