Here is the Flower Cup, which contains the most annoying track in Extra, Toad's Turnpike. But it also contains my favorite Mario Kart track, Mario Raceway. The tracks are:
Toad's Turnpike (reappears in Mario Kart 8)
Frappe Snowland (reappears in Mario Kart DS)
Choco Mountain (reappears in Mario Kart DS)
Mario Raceway (reappears in Mario Kart Wii)