While the base game has many unlockables (like the character for winning all 200cc cups), the Booster Course Pass itself focuses primarily on providing immediate access to new content.
: Beyond tracks, the DLC introduced 8 "exclusive" returning characters not found in the base game: Petey Piranha Diddy Kong Funky Kong Mii Racing Suits mariokart8deluxenspboostercoursepassdlc+exclusive
: Nostalgic tracks like Wii Coconut Mall , N64 Choco Mountain , and DS Waluigi Pinball . While the base game has many unlockables (like