Standard FF attack types

 

300-Percenter (Special)

Causes the next successful melee attack to do triple damage, provided it occurs while the effect is active.
Appearance: small red, white, and blue stars coming off a character's right hand.

Acid Burn (Acid)

The victim is injected with poison or acid and suffers acid damage every second or so until the effect ends. Higher magnitude increases the success rate and length of the effect.
Appearance: victim's body emits green gas.

Alteration (Mystical)

Inflicts a random primary bad status effect (stun, panic, enrage, mental blank, freeze, stasis, hypnosis) and cures a random secondary bad status effect if the target suffers from one (hex, density max, power null, blind, irradiate, acid burn). Higher magnitude increases the success rate.
Appearance: depends on whatever random bad status effect is inflicted/removed.

Animate Dead (Special)

new in FFvsTTR
Creates short-lived zombie copies of recently fallen characters (tanks excepted). Zombies raised from the enemy team will attack each other.
Appearance:
Swirling craniums around the victim.
Note: Available only on area attacks.

Balance (Mystical)

Equalizes the HP between you and your target. Higher magnitude increases the amount of HP equalized.
Appearance: The character with more HP gets a "HP Drained" effect bubble while the other one receives negative damage (healing) .

Blind (Mystical)

changed in FFvsTTR
Severely inhibits an opponent's accuracy and dodge chance. Target character can't use any ranged attack power for the duration. Higher magnitude increases the success rate.
Appearance: smoky black circle around the head of the victim.

Buoyancy (Special)

new in FFvsTTR
Bestows the ability to fly upon the targeted character.
Appearance:
Green transluscent bubbles under the target.

Cerebral Balance (Special)

cures any bad mental state. Higher magnitude increases it's success rate.
Appearance: none, but you'll notice that any mental state effects disappear when this hits.

Clone Other (Radiation)

Creates a duplicate of an enemy that fights for you. You have no control over this duplicate, and they fight with the victim's normal AI, but will not use movement abilities except for Jumper and Wall Climbing. Note that duplicates dissapear when the original is KO'ed.
Appearance: A half-HP duplicate of your foe appears nearby them and begins fighting your enemies.

Commuted Sentence (Mystical)

Swaps secondary states like Blind or Irradiated from the target to the user and vice versa. The duration of the state is increased/decreased as it passes from the one to the other. Higher magnitude increases the success rate.
Appearance: whatever effects were on you now show up on your enemy and disappear from you.

Decrease (Piercing)

new in FFvsTTR
Makes the targeted character go slower.
Appearance:
3 non-wavy horizontal rings with a yellow border appear around the victims's body.

Density Max (Energy)

The victim is slowed considerably and prevented from taking flight; characters already in flight are forced to land. Higher magnitude increases the success rate.
Appearance: Target leaves a trail of small energy bubles radiating from his torso. Note: Bug: Computer-controlled targets are not prevented from taking flight.

Deep Sensor (Energy)

new in FFvsTTR
Discovers the target's vulnerabilities at the cellular level.
Appearance: Target emits energy bubbles and crescents.
Note: Not available for purchase. (Only used by the Eye of the Reich AI to make better decisions on which powers to use against a deep sensored target.)

Disrupt Object (Energy)

The target object explodes, inflicting Energy damage. Higher magnitude increases the damage and knockback of the explosion.
Appearance: target explodes, similarly to Man-bot's explosions or an exploding mushroom.

Doppelganger (Special)

new in FFvsTTR
Randomly transforms an ally player character into another squad member.
Appearance:
Target is transformed into another character.

Energy Leech (Energy)

Steals EP from the target enemy. Higher magnitude increases the success rate and amount of EP stolen. Note that you can steal EP from enemies even if they have none left - this puts them into negative EPs, which means they cannot use any powers that have a cost until they recharge into positive values.
Appearance: target is "EP Drained".

Enraged (Mental)

Lose control of the character, who begins randomly attacking nearby objects and characters according to their AI. Higher magnitude increases the success rate.
Appearance: victim's head emits red lines and spots

Freeze (Cold)

The victim is encased in a solid block of ice, and cannot move or act until hit or the effect ends. Unlike stasis, the character takes no damage from the hit that frees them, and if the hit is not strong enough, the ice will require multiple strikes to break. By default, in FFX, being frozen also causes slow damage to you from frostbite, unless you're made of ice material. Higher magnitude increases the success rate.
Appearance: victim stops moving and is encased in a large block of ice that emits frosty vapors.

Genetic Damage (Radiation)

The victim becomes Vulnerable (2x damage) to every type of damage. Damage types against which the target was Defenseless (4x damage) are also set to Vulnerable. Higher magnitude increases the success rate.
Appearance: a small yellow light hovers above the character's head.

Hex (Mystical)

Causes an opponent to slow down and occasionally stun themselves when using powers. Higher magnitude increases the success rate.
Appearance: red glowing occult symbol under the victim's feet

Hypnosis (Mental)

Lose control of the character, who will begin following the hypnotizer and attacking his or her former allies until the effect ends or they're hit. Hypnotized characters fight according to their AI, but will not use movement powers except for wall climbing and jumper. Higher magnitude increases the success rate.
Appearance: a small blue-green helix hovers over the victim's head and slowly rotates, emitting drifting sparks of a similar color.

Ignite (Heat)

The target object explodes, inflicting Heat damage. Higher magnitude increases the damage and knockback of the explosion.
Appearance: target explodes, akin to a car explosion or thug grenade.

Increase (Energy)

new in FFvsTTR
Makes the targeted character go faster.
Appearance:
Swirling lightning bolts symbols around the target

Interrogateable (n/a)

Simply an effect to indicate that this character is ready to be interrogated.
Appearance: the character enters their stun animation and stops fighting. A red exclamation mark may appear over their head, and they may say something along the lines of "I give up!" Further, their head emits sweat beads, just as if they were panicked.
Note:
Not available for purchase

Irradiate (Radiation)

The victim is given an excessive dose of radiation. The character and those nearby suffer radiation damage every second or so when the irradiated character emits radiation. Higher magnitude increases the success rate and the length of the effect.
Appearance: victim's body emits a yellow glow

Mental Blank (Mental)

Lose control of the character, who will wander aimlessly until the effect ends or they're hit. Wandering characters will use no movement abilities and will move at half speed using their walk animation. Higher magnitude increases the success rate.
Appearance: question marks float away from the victim's head

Mercy (Special)

Transfers some of your HP to the target; for each HP lost, the target gains two. Higher magnitude transfers more HP.
Appearance: You'll see negative damage (healing) on your target.

Molecular Excitation (Energy)

The target object is temporarily destabilized. If the object takes damage during this time, it will explode, inflicting Energy damage. Higher magnitude increases the damage and knockback of the explosion, and the length of the effect.
Appearance: target begins changing colors randomly, and explodes when damaged. The explosion is identical to a disrupt object explosion.

Objectify (Mystical)

new in FFvsTTR
Temporarily turns the target into a vase of flowers.
Appearance:
Target is transformed into a vase.

Panic (Mental)

Lose control of the character, who begins fleeing from hostile characters until the effect ends. If they can, fleeing characters will use wall climbing and jumping, but not flying to escape. Higher magnitude increases the success rate.
Appearance: character's head emits sweat beads.

Polymorph (Mystical)

new in FFvsTTR
Transforms the targeted enemy character into a random ally.
Appearance:
Victims is shapeshifted into an ally.

Possession (Mental)

new in FFvsTTR
Take control of a target and make them do your bidding.
Appearance:
Swirling craniums around the victim.

Power Null (Mental)

changed in FFvsTTR
The victim loses the ability to expend energy until the effect ends, and can only use their zero cost attacks. Higher magnitude increases the success rate and duration.
Appearance: pink motes of light surround the victim removes any power requiring energy from an enemy target.

Purgatory (Mystical)

Temporarily exile an opponent to another dimension. Exiled foes cannot move, act, or be affected in any way until the effect ends.
Appearance: victim becomes translucent.

Rally (Special)

Cures panic and increases mental resistance. Higher magnitude increases the success rate.
Appearance: small red, white, and blue stars coming off a character.

Remove Defence (Special)

new in FFvsTTR
Strips the targeted character of any active defence. Doesn't prevent casting Shield again.
Appearance: Shield disappears.

Restoration (Special)

new in FFvsTTR
Restores all energy and health to the targeted living ally.
Appearance:
You'll see negative damage (healing) on your target.

Spawn (n/a)

new in FFvsTTR
State assumed by a character making a successful possession attack. The possessor's body enters a state similar to Purgatory.
Appearance: Possessor becomes transparent.
Note: Not available for purchase, obviously.

Stasis (Mystical)

Holds an opponent immobile until they're hit or the effect wears off. Higher magnitude increases the success rate.
Appearance: victim stops moving entirely and their head is surrounded by small vibrating vibration marks.

Teleport Swap (Special)

new in FFvsTTR
Allows a player character to swap position with another player character.
Appearance:
Note:
Available only with direct attack powers.

Toadify (Mystical)

new in FFvsTTR
Temporarily turns the target into a toad.
Appearance:
Target is changed in a frog.
Note: Bug: Doesn't work on flying targets.

Transfer (Special)

Grants EP to a target. Higher magnitude increases the amount of EP you give.
Appearance: target is "EP Transferred".

Weaken (Mental)

new in FFvsTTR
Reduces the strength of the targeted character.
Appearance: 3 wavy horizontal rings with a blue border appear around the victims's body.

 

Based on a list initially written by S.H.A.R.P. in a Freedom Reborn post. Thanks!