You must unlock all available Sponsors in the game. They are as follows:
Progression based: (level up and win leagues)
- University of Trials Professor FatShady
- Fox Bas Von Mason
- Ubisoft Pascal
- KTM Laia Russel
- Red Bull Emily Bufoni
- ANBA: Unlocked by purchasing Donkey and/or Helium bikes.
- Legendary Rider: Awarded by completing the "secret" Extreme contracts (about 10 of them).
- Ninja Master Yoshi: Unlocked by completing all Extreme tracks at Gold (or higher).