Challenges list of LuigiDawg

Indentium

Cyborg Speedway : Reach the little indent near the end of the track without falling

You're your own opponent

Duel Dimension : Complete the track in less than 1:05 in Time Trial mode

Beat the Staff Ghost

Clockwork Dunes : Complete the track in less than 1:09

CTR-esque Shortcut

Clockwork Dunes : Reach the Boost Pad in less than 12s, without using any item

The Wild, Wild West

Clockwork Dunes : Go to the Western-most Part of the Track

The Mild, Mild East

Clockwork Dunes : Go to the Eastern-most Part of the Track

Emerald Pun

Crystal Mines : Locate the Emerald in 7th place

FAILING THE SHOWDOWN!

Duel Dimension : Complete the track in VS mode, with 2 participants, in 2nd place

In difficult mode

No! ...rth.

Duel Dimension : Fall in the Northern-Most part of the map

Shiny but Deadly

Duel Dimension : Go in the Off-road Crystal stuff near the start without falling

I mean...there's only one thing you can bonk. So bonk it.

Mushroom Colosseum : Hint: It starts with the letter "P"

Using one of the Secret Stars

Slideaway Speedway : Get a star, than SLAM into the pipe.

Surviving the Clock-Obstacle Course

Clockstacle Course : Complete the track

Nostalgia

Slideaway Speedway : Get to the end (you can't go backwards) in less than 21s, with Mario, without using any item

Looking for the Blue Coin Switch

Slideaway Speedway : Break the Boxes.

Owch

Oh Snow! : Complete the track

If you unlocked Link, you should also be considered a Master.

Master's Dojo : Finish in the 1st position in VS mode, with Link

A master at Winning by only using the Arrow Keys

Master's Dojo : Finish in the 1st position in VS mode, with Wario, without drifting, without using any item

True Master

Master's Dojo : Complete the track in less than 1:00 in Time Trial mode

Things are going South

Master's Dojo : Break the Southern most Box