Challenges completed by hydroblast
Mushroom Avenue : Collect all coins

Wii U Toad Harbor : Collect all coins

Wario's Gold Mine Normal Staff Ghost
Wii Wario's Gold Mine : Complete the track in less than 1:03 in Time Trial mode, in 150cc, with Waluigi

Toad's Factory Normal Staff Ghost
Wii Toad's Factory : Complete the track in less than 59s in Time Trial mode, in 150cc, with Toad

Staff Ghost
DS Airship Fortress : Complete the track in less than 1:37 in Time Trial mode, in 150cc

Nin * Miles_B (Normal Staff Ghost)
Wii Toad's Factory : Complete the track in less than 1:02 in Time Trial mode, in 150cc, with Toad

Speedster
Wii DK Summit : Complete the track in Time Trial mode, in 200cc, by performing 15 Mini-Turbos, by performing 3 tricks

Luigi Circuit Coins
Luigi Circuit : Collect 30 coins in Time Trial mode, with Luigi

autumn hughes tribe 2
haunted castle : Finish in the 1st position

Royal Drifter
Nintendo All Star Racers (Plus) : Finish 1st 1 time in a row by performing 10 Mini-Turbos

Winner! (IOS Only)
Nintendo All Star Racers (Plus) : Finish 1st 1 time in a row in VS mode, in easy mode, with 6 participants

Nick Balloon Battle
Nick Arena 1 : Hit 2 opponents

Daisy's Difficult Speedrun
Daisy Village : Complete the track in less than 55s in Time Trial mode, in 200cc, with Daisy

Nailed It!
Nintendo All Star Racers (Plus) : Finish 1st 1 time in a row in VS mode
With 8 participants

Ring Rally
DK Jungle : Pass Through All 10 Rings in less than 1:10
With 8 participants

Challenge 9
Hyrule Plains : Pass All Of The Checkpoints in Time Trial mode, in less than 1:00

Time Trial Interstate
Interstate : Complete the track in less than 55s in Time Trial mode, in 150cc

Super moon coins.
(SBK) Moon A : Collect 64 coins in 250cc, in VS mode, by performing 10 Mini-Turbos, by performing 5 Super Mini-Turbos

Drifloon used Pay Day!
Drifloon Circuit : Collect all coins without touching any Drifblim, Drifloon nor Piranha Plant

Challenge for Beginners
Waluigi Raceway : Complete the track in less than 1:45 in Time Trial mode, without touching any pipe
