with the Booster Course Pack releases all done, a final total of how many racetracks in Mario Kart 8 are named after each character
Mario (5)
Bowser (3)
DK (3)
Toad (3)
Wario (3)
Yoshi (3)
Peach (2)*
Daisy (2)
Piranha Plant (2)
Waluigi (2)
Boo (1)
Cheep Cheep (1)
Koopa (1)
Rosalina (1)
Shy Guy (1)
Thwomp (1)
Luigi (0)**
*Royal Raceway is called "Peach Circuit" in Japan, so I counted that.
**Luigi's Mansion appears as a Battle course, which doesn't count as a racetrack.