Achieve the following grades in your first playthrough to unlock the corresponding bonuses in the Grade shop on your second playthrough:
GRADE - BONUS 10 Grade - Increase max TP(All characters start with 20% less max TP than usual). 10 Grade - 1/2 experience (Reduces the experience earned in battle by half). 10 Grade - Decrease max HP (All characters start with 20% less max HP than usual). 10 Grade - Collector's book (Keep all collector's book data). 10 Grade - Craft skill (Keep synthesis skill level). 10 Grade - Enemy book (Keep all enemy book data). 10 Grade - Recipes (Keep all recipes learned). 10 Grade - Records (Keep all data from the record menu). 50 Grade - Cooking skill (Keep all characters cooking skill levels). 50 Grade - Unlock battle rank (Unlocks unknown difficulty mode). 50 Grade - Battle techniques (Reduces the normal amount of experience earned in battle to 1, but multiplies bonus experience earned from large combos by 5). 300 Grade - World map (Keep world map data). 350 Grade - Artes & skills for individual characters (Keep all artes and weapon skills for each character). 400 Grade - Max 99 Items - Increases the item limit to 99). 500 Grade - Items - (Keep all non-story related items and equipment). 500 Grade - Titles (Keep all of the titles for all characters). 500 Grade - Increase max HP (All characters start with 20% more max HP than usual). 500 Grade - Increase max TP (All characters start with 20% more max TP than usual). 600 Grade - 2x gald (Doubles gald earned in battle). 1000 Grade - Artes (Keep all learned artes for all characters). 1000 Grade - Double experience (Doubles the experience earned in battle). 1000 Grade - Skills (Keep all mastered weapon skills for all characters). 1000 Grade - Unlock all skits (Able to view all skits, even ones you haven't seen yet, at the skit viewer at nam cobanda isle.) 1000 Grade - Gald (Keep all gald you earned). 1000 Grade - Increase item drop rate (Doubles chance of finding items after battle). 1000 Grade - Increase over limit (The overlimit gauge fills faster, and enemies use overlimit more often). 3000 Grade - 10x experience (Multiplies the experience earned in battle by 10). 3000 Grade - 2x grade (Doubles the grade earned in battle). 3000 Grade - Skill SP 1 (Lowers the SP needed to equip a weapon skill).