GIMMIE

On the Main Menu, open 'Options', then 'Enter Name' and then change the name to GIMMIE (all caps). You'll normally get a message saying that saving is disabled. 
With this code you'll have all characters, all championships and all tracks unlocked in Time Trial.

Woutt64

Cartoon Network Racing (DS)

Aron City Speedway

Nintendo DS

Akuretaki

xX_theo_Xx

Courage

Chicken

Weasel

Johnny Bravo

Dexter

Blossom

Buttercup

Bubbles

I.R.Baboon

Muriel

Suzy

Mojo Jojo

Mandark

Eustace

Dee Dee

Professor Utonium

Bunny Bravo

Red Guy

Normal

Souped-Up

Soupered-Up

Flipped-Out

Character Used

Kart Speed

Nintendo 3DS

New Nintendo 3DS

2DS XL

Cartoon Network (Misc)

Cyberscore

IL Leaderboard Layout

Incorrect Submissions

Speak About Run Here

DeSmuME emulator okay?

MrKepya

ChillCat

shaybug

VibrisUsed6Toy03

6lp4vpzw