Ancient Key
Used to get the White Materia

Basement Key
Used to open the basement in Nibelheim

Black Materia
Used to cast Meteo (Meteor)

Glacier Map
A Map of the Glacier

Huge Materia
Used to get Bahamut ZERO

Keycard 60, 62, 65, 66, 68
Used in the Shinra Tower for the respective floors

Keystone
Used in the Temple of Ancients

Leviathan Scales
Used in Wutai

Midgar Parts
Used in the puzzle in Shinra Tower

Mythril
Used in the Sleeping Man’s cave

PHS
Used to change members at save points and on the World Map

Snowboard
Used to play during your time at the Great Glacier

White Materia
Used to cast Holy

Blonde Wig;
Colonge;
Cotton Dress;
Deodorant;
Diamond Tiara;
Digestive;
Disinfectant;
Dyed Wig;
Flower Colonge;
Glass Tiara;
Members Card;
Pharmacy Coupons;
Ruby Tiara;
Satin Dress;
Sexy Colonge;
Silk Dress;
Wig

All used at Wall Market in Midgar