Last published challenges
Beat Super Sonic's Best Time
Escape From the City : Complete the track in less than 45s in Time Trial mode, in 200cc

24-Player
Mario Circuit 1 : Finish in the 1st position in VS mode, in 200cc, with Mario, with 24 participants, in medium mode
No teams

Obligatory Challenge
Mario Kart 2 (O) - Rainbow Road (Remake) : Complete a lap in Time Trial mode, in less than 35s

Money Cave
Deep deep Cave : Collect all coins in Time Trial mode, in 150cc

Super Mario Bros. 35
Retro Raceway : Finish in the 1st position in VS mode, in 150cc, with SMB Mario, in extreme mode, with 35 participants
No teams

No touch
New Mario Kart (Vers.1.8.9) : Finish 1st 4 times in a row in VS mode, in 150cc, without touching the walls
In difficult mode, with 8 participants, no teams

Grab the Coins!
Donut Plains 2 : Collect all coins in Time Trial mode, in 150cc, with Yoshi, in less than 1:00

200cc Time to Beat
Choco Island : Complete the track in less than 45s in Time Trial mode, in 200cc

200cc Time to Beat
Boo Lake : Complete the track in less than 1:25 in Time Trial mode, in 200cc

150cc Time to Beat
Boo Lake : Complete the track in less than 1:30 in Time Trial mode, in 150cc

150cc Time to Beat
Choco Island : Complete the track in less than 1:00 in Time Trial mode, in 150cc

Beating Bowser's Fastest Time
Bowser's Racetrack : Complete the track in less than 1:30 in Time Trial mode, in 150cc

The Final Boss
Bowser's Racetrack : Finish in the 1st position in VS mode, in 150cc, with 12 participants
In difficult mode, no teams

200cc Time to Beat
Cheep Cheep Beach : Complete the track in less than 1:15 in Time Trial mode, in 200cc

150cc Time to Beat
Cheep Cheep Beach : Complete the track in less than 1:30 in Time Trial mode, in 150cc

A Rival / Un Rival
An arena full of pipes : Finish the game in the 1st position in 150cc, without making tricks, with Dry Bones, without touching any pipe, without touching the walls, without falling, without being hit by any item, without drifting, by starting with 1 balloon, having CPUs starting with 30 balloons
No teams

Linkdom
An arena full of pipes : Destroy 5 pipes in 150cc, without drifting, without touching any pipe, without touching the walls, without making tricks, with Link, with 1 participant, in less than 10s, while constantly accelerating

The Forgotten Waluigi / Le Waluigi Oublié
An arena full of pipes : Reach the end of the arena! in 150cc, without drifting, without using any item, without being hit by any item, without touching any pipe, with Waluigi, without touching the walls, without falling, without making tricks, with 25 participants, in less than 8s, without touching item boxes, while constantly accelerating, with inverted controls, having CPUs starting with 8 balloons, while in rear view, by starting with 1 balloon

MARIO(S) ?!
An arena full of pipes : Survive more than 3:15 in 200cc mirror, without drifting, without using any item, without touching any pipe, without touching the walls, without making tricks, with Luigi, with 1 balloon or more, while in rear view, by starting with 1 balloon, having CPUs starting with 100 balloons
No teams

R
Bouncy speedway 1 : Collect 11 coins in Time Trial mode, in 150cc
