This article presents the specific methods for unlocking every character in Mario Kart Wii. Characters in the game are divided into light, medium, and heavy categories. Understanding these categories helps players choose the appropriate vehicle for each character. There are minor differences in character stats, such as Baby Mario having superior weight and handling compared to Toad, even though both belong to the light class. However, the differences are not significant, so don't stress too much over your choice of character. You can notice these variations more clearly when trying out different characters with the same vehicle.
Steps
Baby Daisy or Daisy

Achieve at least 1 star in the entire Wii Grand Prix Cup 150cc or 50cc, or race a total of 1,950 laps. This will unlock Baby Daisy.

Finish first in the Special Cup 150cc or complete 2,850 laps. This will unlock Daisy.
Baby Luigi

Unlock 8 Expert Staff Ghost Data in Time Trials, win 100 Wi-Fi Ghost races, or complete 10 laps. This will unlock Baby Luigi.
Birdo

Play Time Trials on 16 different tracks, win 250 Wi-Fi races, win the Star Cup, or complete 1,350 laps. This is how to unlock Birdo.
Bowser Jr. and Dry Bowser

Achieve at least 1 star in the entire 100cc Retro Grand Prix Cup or complete 50 laps. This will unlock Bowser Jr.!

Earn at least 1 star in the entire 150cc Wii Grand Prix Cup or complete 70 laps. This is how to unlock Dry Bowser.
Diddy Kong

Win the 50cc Lightning Cup or complete 450 laps. This will unlock Diddy Kong.
Dry Bones

Win the 100cc Leaf Cup or complete 1,050 laps. This is how to unlock Dry Bones.
King Boo

Win the 50cc Star Cup or complete 750 laps. This will unlock King Boo.
Rosalina

Achieve at least 1 star throughout the Mirror Grand Prix Cup, race 4950 laps, or complete 50 laps while ensuring your Super Mario Galaxy save file is stored on your Wii, along with the saved Mii file from Mario Kart Wii. This is how you unlock Rosalina.

Complete all 150cc cups and defeat 18 Staff Ghosts. This will unlock Rosalina.
Toadette

Participate in Time Trials across 32 different tracks, win 1,000 Wi-Fi races, or race a total of 2,550 laps. This is how you unlock Toadette.
Mii

Win the 100cc Special Cup. Unlock Mii (Outfit A).

Unlock all 32 Expert Staff Ghosts in Time Trial mode or win 5,000 times in Nintendo WFC. This will unlock Mii (Outfit B).
Funky Kong

Unlock 4 Expert Staff Ghosts in Time Trial mode, win 25 Wi-Fi races, or complete 2,250 laps to unlock Funky Kong!
Tip
- Try to find shortcuts on each track to unlock characters more quickly and easily.
- Saving Super Mario Galaxy on your Wii will make unlocking Rosalina much easier.
- Race against 8 Staff Ghosts on the Mario Kart Channel to unlock Baby Luigi.
- Use speed and shells wisely (don’t waste them).
- Occasionally rotate the camera to check for any incoming shells, as you can defend yourself with bananas if needed.
- Use bananas to block red shells from behind.
- When the POW block flashes for the third time, perform a front-wheel lift and spin around before continuing.
- Always have something (like a shell or banana) behind you to protect yourself from incoming red shells that you can’t see.
- Always launch red shells at opponents ahead of you.
- If you have a mushroom, use it when you have a spiked shell in hand.
Warning
- It may take a long time to unlock all characters.
- All characters can only be unlocked in single-player mode.
- It may not be possible to unlock Toadette on some handheld consoles due to a Nintendo server error.
