Last published challenges
Water slide
Water Park : Complete the track in less than 1:00 in Time Trial mode

Is TF2 harder than Mario Kart ?
TF2 Circuit : Complete the track in VS mode, in 200cc, without touching any fire plant, Goomba, Piranha Plant, Chomp nor Bullet Bill, without being hit by a red shell or a bullet bill

Grumble volcano but 4 laps : Finish in the 1st position in 25cc, with 2 participants

imposter time
the skeld raceway : Complete the track in less than 50s in Time Trial mode, in 200cc

Collect Coins
Relic Sands : Collect 35 coins

Proto Man
All-Star Kart : Finish 1st 1 time in a row in VS mode, in 150cc, with 2 participants, in extreme mode
No teams

Luigi
All-Star Kart : Finish 1st 1 time in a row in VS mode, in 150cc, with 2 participants, in easy mode
No teams

the seven seas
Metltin rink : Complete the track in 150cc

Racing Duel: Wargor vs Waluigor
Capital City Duel Race : Finish in the 1st position in VS mode, with 2 participants, with Wargor
In difficult mode

Ice Skating Queen
Waluigi's Ice World : Complete the track in 150cc, in Time Trial mode, without falling, without touching any pipe, snowman nor snow ball, without taking the mini-jump, by taking the left path, in less than 1:15, with Rosalina, while constantly accelerating

Don't touch a Banana.
Mario Circuit 2 : Complete the track in Time Trial mode, without touching the walls, without being hit by a fake item box, a banana, a green shell, a red shell or a poison mushroom

Coin collector
Sherbet land : Collect all coins in Time Trial mode

Impossibly... Doable?
Larry's Scratchy Castle : Finish in the 1st position in 500cc, in impossible mode

Unlucky Items
Larry's Scratchy Castle : Hit all item boxes in less than 13s

Mushroom GP Winner
Mushroom Cup : Get the gold cup in Grand Prix mode, in 150cc

Beat the Staff Ghost
Larry's Scratchy Castle : Complete the track in less than 1:02:258 in Time Trial mode, in 150cc

Super (Short) Circuit
Larry's Scratchy Castle : Complete the track in less than 40s in 200cc, in Time Trial mode, without falling

idk
Random cup : Finish 1st 2 times in a row in VS mode, with inkling boy, in medium mode
With 8 participants

2-1: Breaking the Queue
SBOK7 SBOK4 Toadette Funfair : Enter the arcade in VS mode, in 50cc, without touching any Hampter, without drifting, in less than 35s, with 1 participant, while constantly accelerating

DINGDINGDINGDINGDINGDINGDING!!!!!
Minecraft Raceway : Hit the two bells in the village without drifting, in less than 17s
