HP (Hit Points) : Character's Health
AP (Action Points) : Used for Gimmicks
ATK Physical strike damage : determined by character's Weapon Rating and Power
WR (Weapon Rating) : Character's total Weapon Rating value (including equipped gear)
AR (Armor Rating) : Character's total Armor Rating value (including equipped gear)
DR% (Damage Reduction) : Percentage of how much incoming damage is reduced. Determined by character's Sturdiness and total Armor Rating.
STU (Sturdiness) : Character's base toughness. Affects Damage Reduction and resistance to certain negative physical status effects
SPD (Speed) : Determines character's inititave and ability to dodge in combat. Affects TBJ's stealing gimmick.
CHA (Charisma) : Affects Hype Meter generation rate
TLN (Talent) : Affects certain gimmicks, and resistance to certain negative mental status effects
LUK (Luck) : Affects many stats in small and strange ways!
ACC (Accuracy) : Chance to hit with physical strikes. Determined by attacker's Power + Luck, versus to target's Dodge
DGE (Dodge) : Chance to dodge attacks. Determined by target's Speed + Luck, versus attacker's Accuracy
POW (Power) : Affects damage of physical strikes
CRT (Critical) : Chance to land critical strikes on targets
INF : Hype Meter increases by this stat's amount after each action. Determined by Charisma


Source : Neoseeker.com