Unlock Aimee:
     Complete the Bowl Ramp in Ramp Mode to unlock Aimee.

Unlock Bluebee:
     Complete  all  Combo  stages and the final stage in Combo Mode to
unlock Bluebee.

Unlock Clarice:
     Complete all Gawoo Attack stages and the final stage of Challenge
Mode to unlock Clarice.

Unlock Grandma B.:
     Complete all normal ramps to unlock Grandma B.

Unlock Mr. Honda:
     Complete  all  Trick stages and the final stage of Challenge Mode
to unlock Mr. Honda.

Unlock King Gawoo:
     Complete  Street  Mode  on  Normal difficulty, and then beat King
Gawoo in Street Mode on Normal difficulty to unlock King Gawoo.