Does using NTR disqualify a run?
I don't run the game, but I'm just saying NTR shouldn't matter in this game since NTR doesn't actually overclock, just forces games to run at the New3DS specs. Since MM3D already takes advantage of the improved specs it means NTR doesn't make MM3D run faster.
NTR speeds up loading times, so it's not allowed if your time is considered competitive. You can always ask in the discord if your time is considered competitive or not.
I think in any% something under 1:30:00 will be refused if it's recorded with NTR.
Hope it helped.