Challenges completed by hydr0blast

Bell

Fire Hydrant : Eliminate 1 opponent by yourself

Orange

Fire Hydrant : Hit 5 opponents

Strawberry

Fire Hydrant : Finish the game in less than 5s

Bowser's Ultimate Shortcut

Bowser's Twisted Castle : Complete the track in less than 1:10

Mmmm...

Taco Bell : Finish the game in the 1st position with 4 participants

TACOEHTYRAG

Taco Bell : Finish the game in the 1st position

T A C O

Taco Bell : Collect all coins

Beat the Staff Ghost

Goldenrod Heights : Complete the track in less than 1:28 in Time Trial mode

Beat the Staff Ghost

Chili Volcano : Complete the track in less than 56s

This is basically Toad's Factory 17

Banzai Factory : Finish in the 1st position with 12 participants, with Toad

In difficult mode

Beat the Staff Ghost

Hiker's Trail : Complete the track in less than 1:16

Beat the Staff Ghost

Major Circuit : Complete the track in less than 1:16 in Time Trial mode

Oh Neptune.

Jellyfish Fields : Complete the track in less than 1:15 in Time Trial mode

Beat the Staff Ghost

Bowser's Castle : Complete the track in less than 1:28 in Time Trial mode

Beat the Staff Ghost

Indigo Circus : Complete the track in less than 38s in Time Trial mode

Piranha Time

Sky-High Speedway : Go in the center of the Piranha Plants in less than 7s

Beat the Staff Ghost

Sky-High Speedway : Complete the track in less than 1:04 in Time Trial mode

Beat the Staff Ghost

Good Vibes Burg : Complete the track in less than 1:00 in Time Trial mode

Beat the Staff Ghost

Marsh Plateau : Complete the track in less than 53s in Time Trial mode

Beat the Staff Ghost

Goomba Park : Complete the track in less than 50s in Time Trial mode