ショック [shock] or ショック! [shock!] in Japanese, depending on the game. The Japanese name is noted in the data sections only when it is 'Shock!' instead of 'Shock'.
Final Fantasy IX
Type: Sword Skill, MP: 46
Usable by: Adelbert Steiner
Obtain: ?
Other: Deals physical damage to the enemy
Other: ショック! in Japanese
Final Fantasy XI
Type: Black Magic, Category: Elemental Magic, MP: 25
Learn at: BLM 16
Casting: 2.5 s, recast: 10 s
Buy: Zaira/Bastok, Regine/San d’Oria, Aroro/Windurst
Other: Deals lightning damage that lowers an enemy’s mind and gradually reduces its HP
Other: Overwrites Drown, is overwritten by Rasp. Stackable with Burn&Choke or Frost
Final Fantasy XII
Type: Black Magic, MP: 34
Element: Magical / None, Accuracy: 100, Power: 133
Target: enemies/allies, Radius: single, Range: 10, Charge Time: 30
Long Range: yes, Magick Evasion: yes, Safety Nullify: no, Reflect: yes
Faith Effect: power x1.3, Recover MP: Warmage, Remove Sleep/Confusion: no
License: Black Magick 6, LP: 50
Buy: 9,400 gil (sell: -)
Shop: Balfonheim (after Pharos)
Effect: Deals damage to one target
Final Fantasy Tactics
Vengeance (Templar)
Type: Spellblade, Element: -, MP: 20
Target: any, Range: 8 horizontal, any vertical, Radius: 1, Power: -
Speed: instant, Duration: battle, Line of Fire: No
Learn: Templar (600 JP)
Effect: Deals damage. 100% success rate.
Other: can only be used when equipped with a sword, knight's sword or fell sword
Other: Damage = User's max HP - User's current HP
Other: ショック! [shock!] in Japanese
Other: as 'Vengeance'
Vengeance (Byblos)
Type: Byblos, Element: -, MP: -
Target: any, Range: 5 horizontal, 3 vertical, Radius: 1, Power: -
Speed: instant, Duration: -, Line of Fire: No
Learn: Byblos (default)
Effect: Deals damage
Other: Damage = User's max HP - User's current HP
Other: as 'Vengeance'. Note that despite the English name being the same as the name of the Templar ability, the JP name is slightly different, with the Templar's version having an exclamation mark while it's missing from Byblos's version
Explorers
Type: Sword Skill, Equip Load: 30, AP Cost: 100
Target: area centered on user, Power: 80, Element: -
Cast time: ?, Recast: 7 sec
Learn: 3,000 CP, Specialty: Knight, Paladin
Unlock: learn Air Braver, reach main quest ★★★ level
Description: Does a special damage slash attack with the user in the center. Can be charged by pressing the button longer. Power changes by charge level
Airborne Brigade

N+
Type: INT, Element: Thunder, Growth: Normal, Cost: 5
Attack: 330 (lv1), 1,065 (lv40), 1,254 (lv50), 1,442 (lv60), 1,631 (lv70), 1,820 (lv80)
Defense: 330 (lv1), 858 (lv40), 993 (lv50), 1,129 (lv60), 1,264 (lv70), 1,400 (lv80)
Place: many
N
Type: INT, Element: Thunder, Growth: Fast, Cost: 1
Attack: 90 (lv1), ? (lv20), ? (lv25), ? (lv30), ? (lv35), 270 (lv40)
Defense: 70 (lv1), ? (lv20), ? (lv25), ? (lv30), ? (lv35), 200 (lv40)
Place: many
Category: Ability