Complete the game and save it, then load the cleared saved game file to start a new session and access the Grade shop. The following items that can be purchased with Grade Points have the corresponding effects:
1/2 Level: Retain half of your max level when you start a new game.
AC +2: Increase the max AC of your character by 2.
Accessories: Carry your accessories over your next file.
Arts Count: Keep Arts Usage data.
Consumables Items: Carry your consumables items over your next file.
Damage x2: Increase damage by double (this includes enemies as well.)
Drop Rate x2: Doubles the chance of finding items after battle.
Experience x2: Increase the experience earned in battle by double.
Experience x5: Increase the experience earned in battle by 5x.
Full Level: Retain your max level when you start a new game
Gald x2: Increase the Gald earned in battle by double.
Gald: Retain your Gald when you start a new game.
Link Gauge: Increase the rate of the Link Gauge by double.
Material Point x2: Increase the rates of material points by double.
Material: Carry your material items over your next file.
Max 30 Items: Increases the item limit to 30.
Max 99 Items: Increases the item limit to 99.
Max AC +1: Increase the max AC of your character by 1.
Shop Level: Retain your shop level when you start a new game.
Skill SP 1: All skills are reduced to 1 SP
Special Item: Start a new game with Winged Boots and Arts Ball.
Unlock All Skits: Unlock all skits. You can view skits at the libary option on your menu.
Visual Item: Carry your appearance item (Costume, etc...) over your next file.