So today, I was gonna send in a run of this game but, I noticed that they took down the leaderboard and replay mode. I was scared but If anyone knows anything then pls reply. I have a world record on the line. :(

The reason for this is because of Nintendo taking down the 3DS/Wii U servers. Making the leaderboards unusable. I haven’t tested it myself yet but I believe the server revival “Pretendo” fixes it but again, haven’t tried myself.

That was always really silly that the game requires connecting to the online leaderboard just to view your own replay, as the replay must be stored in your own game--It's been observed that online replay records would expire 3 months after the last time the player visited the leaderboard, and visiting it again would put it back on there for another 3 months, though you'd lose your place in a list of tied times from everyone else's perspective if you let it expire first.