Tidus - Sword Skill.

There's a cursor that moves left & right. If you have a good timing & press the action button when the cursor is at the center, you inflict more damage.

Yuna - Monster Summon

Yuna summons a beast with their overdrive gauge at MAX

Wakka - Slot

Wakka attacks depending of the color of the atribute the slot chooses.

Kimari - Enemy Skill

You can acquire enemy skills with the Dragon Sword ability and (of course) you can use them later vs. your enemies.

Lulu - Temptation

During acertain amount of time you have to make combinations with the R3 stick. Depending on the combination, Lulu makes a combination of spells.

Auron - Secret

You acquire auron's overdrive techniques from the different places you visit. As the name of the overdrive says, you have to find the secret places.

Rikku - Compound

You combine 2 items to make a new one.

Overdrive