Shield Bash

Shield Bash is a recurring ability in the Final Fantasy series.

Final Fantasy XI
Shield Bash is an ability gained by a Paladin once they reach level 15. The ability can be used once every five minutes. When activated, the Paladin will use their shield to strike the enemy for a small amount of damage; however, its true application is its ability to Stun a creature and interrupt spell casters. It is relatively unreliable for stopping creatures' special abilities.

This ability does create a large amount of enmity, similar to the fighter skill Provoke. The effect of Shield Bash can be increased if the Paladin is wearing Valor Gauntlets, Knightly Earrings, or has an Aegis Shield equipped.

Final Fantasy Tactics A2: Grimoire of the Rift
Shield Bash is an Action Ability available to the Gria Raptor job. It is learned from the Beastsword. It targets one adjacent foe, pushing them back one tile and possibly inflicting the Disable status. Strangely, while the Shield Bash attack requires the unit to be holding a shield, the Beastsword required to learn the skill is a two-handed weapon, and as such cannot be equipped alongside a shield. So unless the Raptor had previously learned Monkey Grip in order to wield the Beastsword with one hand, they would be unable to use Shield Bash until they master it and equip a different, one-handed weapon to use with a shield.

Dissidia Final Fantasy
Shield Bash is an HP attack available to Firion. He raises his shield and creates a magic barrier to block attacks. It blocks a Bravery Attack and follows up with one of two counterattacks: a knife combo if the attacker is close to Firion or a magic combo if the attacker is further away. Firion learns the attack at Level 30. It costs 40 CP to equip and 180 AP to master.

Dissidia 012 Final Fantasy
Shield Bash is one again an HP attack available to Firion. Firion learns the attack at Level 30. It costs 40 CP to equip and 180 AP to master.