need walkthrough freeflight pilotwings 3ds

Answer 1

Diamond class

Get a "3 Star" rank in all Silver, Gold, and Platinum class missions to unlock the Diamond class.
Meca Hawk Diorama

Get a "3 Star" rank in all missions in Mission Flight mode. Meca Hawk can be found walking around Wedge Island in Free Flight mode.
Super aircraft in all missions

Get a perfect score in every mission to unlock the super aircraft in all missions.
Castle on Private Island

Collect all 75 Sight Rings in Free Flight mode to get a Castle on Private Island.
Free Flight vehicles

Successfully complete the indicated task to unlock the corresponding vehicle in Free Flight mode:
Cycle Glider: Successfully complete all Gold class missions.
Super Rocket Belt: Successfully complete all Platinum class missions.
Turbo Jet: Successfully complete all Silver class missions.

Free Flight collectibles

Reach the indicated class to unlock the corresponding collectible in Free Flight mode:
Balloons: Silver class
Extras: Gold class

Mario reference

In the "Three Minute Glide" mission, the sound of Mario dying can be heard when you fly through the small village.