How to unlock characters in mario kart wii

There are 14 secret characters in Mario Kart Wii that can be unlocked. Below is a list of characters to unlock the form. 

1. Birdo: You have to play 16 different courses in Time Trial mode

2. Daisy Baby: Play all the 50cc cups and get at least a "One Star" rank in all

3. Bowser Jr.: Play all 100cc Retro Cups and get at least a "One Star" rank in all
4. Diddy Kong Complete all 50cc cups

5. Dry Bowser: Play all 150cc cups and get at least a "One Star" rank in all

6. Daisy: Get first place in the 150cc Special Cup

7. Dry Bones: Get first place in the 100cc Leaf Cup

8. Baby Luigi: First unlock expert staff data Spirit for beating a regular staff by      7 seconds. Then eight experts unlock the staff ghost data in time trials.

9. Funky Kong: Unlock 4 Expert Spirit data staff in the Time Trial mode.

10. Mii (Outfit A): Get first place in the 100cc Special Cup

11. Mii (Outfit B): You have to unlock all of the 32 experts Spirit Personal Data in Time Trials. To unlock the expert data Personal Spirit, you have to beat the regular staff by 7 seconds.
12. King Boo: Get first place in the 50cc Star Cup

13. Toadette: Just play the 32 courses in Time Trial mode. It can also be unlocked to earn 1,000 Wi-Fi online matches.

14. Rosalina: Play all Mirror Mode Wii Cups and get at least a "One Star" in all of them.