LV Up is a command ability learned by the Guardian Force Tonberry. It enables the player to increase the target's Level, allowing for better item drops, steals, EXP, and Draws, at the cost of making the enemy more powerful, although bosses are immune to the ability. The maximum level the ability can raise an enemy to is 100.
Level Up is a support ability learned by everyone. It is learned through Iron Helm, Egoist's Armlet, Fairy Earrings, Pearl Rouge, and Rosetta Ring. It increases the experience earned by 1.5, rounded down.
Mastering this ability requires 75 AP for Zidane, 30 AP for Vivi and Dagger, 50 AP for Steiner and Amarant, 40 AP for Freya, 60 AP for Quina, and 65 for Eiko. Seven Magic Stones are needed to equip it.