Maximum HP Achievement
Reach maximum HPThis achievement can be done very easily later in the game, assuming you have been teaching your Guardian Forces their extra skills. Use the Brothers Guardian Force to learn the HP+20%/40%80% skills to equip on Squall. You can also try to Draw as many Tornado spells as possible and Junection this to your health for a huge boost. Depending on your level and initial HP stat, this should boost you up to 9999 and unlock the achievement.