The Legend of Zelda: Majora's Mask Forum  /  why isnt 3ds a platform? i want to run!!!
  LeviTheRelentlessLeviTheRelentless

It is. A simple 2-second search on here and you'd find it.
https://www.speedrun.com/mm3d
An_DAn_D, PearPear and 5 others like this. 
  LyrenLyren

The Legend of Zelda: Majora's Mask 3D is a different game, hence it's its own leaderboard.