To unlock these unlockables, you must play through the game.

Unlockable	How to unlock
Ascension Tournament	Win Beta League.
Citta Nuova	Win Alpha League.
Flash	Win Ascension Tournament On Venom Class.
Karbonis	Get All Gold Medals On Alpha League And Beta League In Single Race Mode.
Livery Mode	Win Ascension Tournament On Flash Class.
Mandrashee	Get 60 Gold Medals.
Manor Top	Get 40 Gold Medals.
Medievil	Get 70 Gold Medals.
Phantom	Win Ascension Tournament On Rapier Class.
Rapier	Win Ascension Tournament On Flash Class.
Sagarmatha	Get 25 Gold Medals.
Sebenco Climb	Win Alpha League.
Sinucit	Win Alpha League.
Sol 2	Win Alpha League.
Zone	Get All Gold Medal In Zone Mode.