Like most unlockable parts, you will have to get sufficient coins to unlock it. However, these unlocks are completely random so there is no specific amount of coins needed to unlock the B Dasher.
Get at least 1 star rank on all 150cc Retro cups.
B-Dasher (medium kart) - Unlock 24 Expert Staff Ghost data
Unlock 24 expert staff ghost data records, the "b dasher" is also known as the "Sprinter" in the American version of Mario Kart wii.
(medium): Win the Mirror Star Cup.
Unlock 24 out of 32 expert ghost datas.
If you need to unlock her in Mario kart wii here is the answer: Win the 150cc Special Cup. If you need to unlock her in Mario Kart 7 here is the answer: Win the 150cc Mushroom Cup. Source: I beat Mario Kart Wii, and I unlock Daisy in Mario Kart 7.
yes
You will unlock it randomly i think
No Rosalina doesn't. But the stars are like her kids... kinda
i don't know and get a life
there are no cheats
1800 coins
You can't, he's not in Mario Kart DS. However, you can get him in Mario Kart Wii, Mario Kart 7, and Mario Kart 8, and Mario Kart 8 Deluxe.
Beat the Shell Cup on 150cc
Yes, you can. You can unlock him by getting first on the special cup 150cc.
No. I also wanted to unlock him in these games,too
No. Mario Kart 7 is ONLY for the 3DS. Mario Kart Wii is not the same thing as Mario Kart 7.