The following is the complete list of weapon abilities that you can customize onto your equipment, via the "Customize" option in the main menu (after Rikku has joined the party):
| Ability | Description | Items Required |
| Sensor | View enemy data during battle | Ability Sphere x2 |
| First Strike | Act first at the beginning of battle | Return Sphere x1 |
| Initiative | Raises party's chances for a pre-emptive strike | Chocobo Feather x6 |
| Counterattack | Strike back after being physically attacked | Friend Sphere |
| Evade & Counter | Evade physical attack and strike back | Teleport Sphere |
| Magic Counter | Strike back after being attacked with magic | Shining Gem x16 |
| Magic Booster | Use more MP to heighten spell power | Turbo Ether x30 |
| Alchemy | Doubles the potency of recovery items | Healing Water x4 |
| Piercing | Deal normal damage to armored enemies | Lv. 2 Key Sphere |
| Half MP Cost | Reduces MP cost of spells by half | Twin Stars x20 |
| One MP Cost | Reduces MP cost of spells to 1 | Three Stars x30 |
| Double Overdrive | Charges Overdrive gauge at double speed | Underdog's Secret x30 |
| Triple Overdrive | Charges Overdrive gauge at triple speed | Winning Formula x30 |
| SOS Overdrive | Charges Overdrive gauge at double speed when HP low | Gambler's Spirit x20 |
| Overdrive -> AP | Earn more AP instead of charging Overdrive gauge | Door to Tomorrow x10 |
| Double AP | Doubles amount of AP earned | Megalixir x20 |
| Triple AP | Triples amount of AP earned | Wings to Discovery x50 |
| No AP | No AP earned after battles | None |
| Break Damage Limit | Allows max damage to exceed 9,999 | Dark Matter x60 |
| Gillionaire | Doubles amount of Gil earned | Designer Waller x30 |
| Firestrike | Adds fire element to attacks and skills | Bomb Fragment x4 |
| Icestrike | Adds ice element to attacks and skills | Antarctic Wind x4 |
| Lightningstrike | Adds lightning element to attacks and skills | Electro Marble x4 |
| Waterstrike | Adds water element to attacks and skills | Fish Scale x4 |
| Deathstrike | Almost always adds death to attacks and skills | Farplane Wind x60 |
| Deathtouch | Sometimes adds death to attacks and skills | Farplane Shadow x30 |
| Zombiestrike | Almost always adds zombie to attacks and skills | Candle of Life x30 |
| Zombietouch | Sometimes adds zombie to attacks and skills | Holy Water x70 |
| Stonestrike | Almost always adds petrification to attacks and skills | Petrfiy Grenade x60 |
| Stonetouch | Sometimes adds petrification to attacks and skills | Petrify Grenade x10 |
| Poisonstrike | Almost always adds poison to attacks and skills | Poison Fang x24 |
| Poisontouch | Sometimes adds poison to attack and skills | Antidote x99 |
| Sleepstrike | Almost adds sleep to attacks and skills | Dream Powder x16 |
| Sleeptouch | Sometimes adds sleep to attacks and skills | Sleeping Powder x10 |
| Silencestrike | Almost always adds silence to attacks and skills | Silence Grenade x20 |
| Silencetouch | Sometimes adds silence to attacks and skills | Echo Screen x60 |
| Darkstrike | Almost always adds darkness to attacks and skills | Smoke Bomb x20 |
| Darktouch | Sometimes adds darkness to attacks and skills | Eye Drops x60 |
| Slowstrike | Almost always adds slow to attacks and skills | Gold Hourglass x30 |
| Slowtouch | Sometimes adds slow to attacks and skills | Silver Hourglass x16 |
| Strength +3% | Enhances physical attack power by 3% | Power Sphere x3 |
| Strength +5% | Enhances physical attack power by 5% | Stamina Spring x2 |
| Strength +10% | Enhances physical attack power by 10% | Skill Sphere x1 |
| Strength +20% | Enhances physical attack power by 20% | Supreme Gem x4 |
| Magic +3% | Enhances magic attack power by 3% | Mana Sphere x3 |
| Magic +5% | Enhances magic attack power by 5% | Mana Spring x2 |
| Magic +10% | Enhances magic attack power by 10% | Blk Magic Sphere x1 |
| Magic +20% | Enhances magic attack power by 20% | Supreme Gem x4 |
| Capture | Capture fiends for the monster arena | None |