- Unlock Shadow by beating the game twice on normal
with the same plane.
- Unlock Sol & Ray by beating the game three times
on normal with the same plane.
- Unlock Lil' Susie by beating all the Propeller
- Unlock HKT-7700 by beating all the Propeller Stunt
- You unlock the Extreme difficulty level at the same
time you unlock Sol Ray.
- When you beat all Propeller Challenge courses you
earn the Air Shark Blimp.
- In order to get any of the Stunt, Challenge, and
Ability unlockables you must have Shadow and Sol Ray
- Try them and do it for every character.