How to unlock shadow?

You Can Not Unlock Him,But I Will Give You the codes for the other characters

funky kong:4 fast ghosts unlocked

baby luigi:4 fast ghosts unlocked

baby daisy:1 * rank on all 50 CC Cups

Dry Bowser:1 * rank on all 150 CC Cups

dry bones:100 cc leaf cup won

king boo:win 50 cc lightning cup

Bowser JR:1* Rank on all 100cc cups

diddy kong:win all 50cc cups

mii outfit A: 100CC Special Cup won

mii outfit B:All 32 expert staff ghosts unlocked

Rozalina:beat 250 people in online racing or have a saved game file from super Mario galaxy.

Good Luck On Unlocking Them!