Where are all the masks in fossil fighters?

Note: Sometimes you have to wear a certain mask (need --- mask) to get a certain mask.

BB Boy/BB Girl Mask: Available in the shop after you defeat Frigisaurus with Ignosaurus on your team.
Chieftain Mask: Complete the 2nd hip-shaker test. (need digadig mask)
Digadig Mask: Complete the 1st hip-shaker test.
Dinaurian Mask: Available in the shop after you defeat Guhnash and save the world (again).
Diving Mask: Go to Bottomsup Bay for the 1st time.
Dropping Mask: Give 30 dropping fossils to Nick Nack.
Gold Mask: In one of the treasure chests on the sunken ship in Bottomsup Bay.
Green Hero Mask: Available in the shop after you talk to the boy in the fossil stadium that wants to meet Vivosaur Man.
Hip-Shaker Mask: Complete the 3rd hip-shaker test. (need the chieftain mask)
Master Mask: Defeat Saurhead and become a Master Fighter.
Mole Mask: Complete the 1st mole quest.
Officer Mask: Defeat and capture Blambeau for the 3rd time.
Oonga Oonga Mask: Complete the Oonga Oonga quests.
Purple Hero Mask: Defeat the boy in the fossil stadium that wants to meet Vivosaur Man. (need green hero mask)
Samurai Mask: Defeat the Fossil Samurai.
Saur Mask: Talk to Saurhead in the fossil stadium after your first visit to the dinaurian spaceship.
Stone Mask: Complete the 2nd mole quest. (need the mole mask)