Challenges list of LuigiDawg
They're not cannons, but they'll do.
Crumbly Battle Canyon : Touch a pipe.

So ein mist!
Crumbly Battle Canyon : Finish in the 1st position in VS mode, with Wario, without drifting, with 9 participants

Hey, Stinky!
Murky Swamp : Reach the Pipe. It's as simple as that. But you do have to do it with Mario

Cohm On!
Murky Swamp : Break the 𝔹𝕠𝕩 with Wario

Stihkeur Ctahrr
Ribbon Streamway : Complete the track in VS mode, in 100th place, in easy mode

Can't they see I'm busy spoiling myself-AAAAAAAAAAAHH!
Jellyfish Fields : Take a bath in the tub at the top of Spork Mountain. (You're gonna have to use the ramp)

The Supercut
Jungle Temple : Go sideways off the 1st Ramp

Da Bohcksehz
Jungle Temple : Go to the alley behind the boxes.

There's gotta be Boxes on a CTR-inspired track!
Sunset Skyway : Break the "Item" Boxes.

Pinstripe's Challenge
Sunset Skyway : Complete the track in less than 1:03

A Secret Shortcut that will help you in the Time Trial Challenge (Y'know, once it's validated)
Cyborg Speedway : Reach the 2nd Boost Panel without falling

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
