Last published challenges
Starry Travels
Solar Rollercoaster(Remake) : Reach the cannon in Planet Eruption in Time Trial mode, in 200cc class, without falling, without touching the walls, by taking at most 2 cannons, in less than 12s, without taking the shortcut, with Yellow Toad

Beat Koopa Troopa!
Koopa Cape : Finish in the 1st position with Yoshi

Thwomp Weaver
Thwomp Jump fort : Finish in the 1st position in 125cc mirror class, without touching any Thwomp

Beat The Mario Bros!
Yoshi Cup : Get the gold cup

Devil's Luck
Battle Arena 5 : Finish the game in the 1st position in 66cc class, without losing any balloons, with Mario, in less than 0:06:666, without inflating any balloons, without touching item boxes, by starting with 6 balloons, having CPUs starting with 666666 balloons

BOSS BATTLE: Vs. Star Thwomp King
Battle Arena 5 : Eliminate 1 opponent by yourself in 150cc class, without touching any Thwomp nor Star Thwomp, without falling, with Rosalina, with 2 participants, in less than 2:00, in 1st place, by taking at most 24 jumps, without losing any balloons, by starting with 1 balloon, having CPUs starting with 36 balloons
No teams

Cyan Shell Shock (hint: 1st thwomp ≈ 1st checkpoint)
Road of Beginning : Finish in the 1st position in VS mode, in 150cc class, with Wal68, in impossible mode, with 12 participants
No teams

Please do not ever drive like this irl
Moonview Highway (MK8 Remake) : Complete the track in less than 1:22 in Time Trial mode

Negligent Driving
Moonview Highway (MK8 Remake) : Complete a Reverse Lap in Time Trial mode, in less than 32s

4-4: Taking Out the Hideout
SBOK7 Jack O'Goomba Patch : Destroy 36 Jack O'Goomba in VS mode, in 150cc class, with 1 participant, without falling, in less than 34s

1-4: Sugary Bridge
SBOK7 SBOK6 Choco Chapel : Reach the end of the chocolate bridge in Time Trial mode, in 150cc class, without touching any Jumping Donut, without falling, in less than 32s

Welcome!
Mushroom Kingdom Cup : Make at least 15 points in 2 races in VS mode, with 12 participants, by taking at most 30 jumps

Mission 1-8
Shy Guy Circuit 2 : Reach the finish before your opponent. in 150cc class, in VS mode, with 2 participants, in less than 25s, in 1st place, You must reach the finish line before your opponent in under 25 seconds.

This is almost impossible.
Ice Ice Outpost : Complete the track in less than 1:36 in 150cc class, in Time Trial mode

This is too easy.
Ice Ice Outpost : Complete the track in less than 2:00 in 150cc class, in Time Trial mode

Mission 1-Boss
Shy Guy Circuit 2 : Complete the track in VS mode, with CL54321, with 2 participants, by starting with 60s delay, in 1st place
In difficult mode

Mission 4-BOSS: The Final Mission?
Rainbow Road : Go through the shortcut route in Time Trial mode, in less than 20s

Rush Hour!!!
Dumb-Dumb Mall : Complete the track in less than 2:45 in VS mode, in 200cc class, in 35th place or better, with 65 participants, with Toad

Difficult!
Squeaky Clean Sprint : Complete the track in less than 1:27 in Time Trial mode, in 150cc class

You don't know what you're getting into.
Baby Park : Finish in the 1st position without being hit by a fake item box, a banana, a green shell, a red shell, a bobomb, a blue shell, a mega mushroom, a star, a bullet bill or a poison mushroom
With 8 participants, in difficult mode
