Complete the Mushroom and Flower Cup.
Get a star rank in all 50cc cups.
Rob is not in Mario Kart Wii.
Complete the first stages
You have to unlock one expert staff ghost in time trials
Simple, you don't, you unlock baby daisy.
You have to unlock 8 expert staff ghost data to unlock him
To unlock Dry Bowser in Mario Kart Wii, you must win the 150cc Mushroom Cup, Flower Cup, Star Cup, and Special Cup with a ranking of at least one star on each.
Sorry, I dont think giga bowser is a character in Mario Kart Wii.
Play 16 time trial races.
by getting good times on each track.
You can unlock King Boo by playing the Time Trial for the Ghost Raceway.
go online and look for Mario cart character/game cheats