Style Change

Unreleased The Mode Change is a new battle system that appears in Kingdom Hearts Birth By Sleep. Terra, Aqua, and Ventus have times when the Command Bar at the top of their Command Menu fills up after hitting enemies they can undergo a Mode Change which grants increased strength and new Deck Commands. There are certain Mode Changes that all of them can change into but they have their own unique Mode Changes that only one can perform. Mode Changes allow a different style for each of them to fight with either Magic or combo attacking.

Terra

 * Fatal Mode: An exclusive powerful fighting style for Terra that utilizes slow, but heavy hits to their maximum.
 * Rock Breaker: After fulfilling certain requirements, Fatal Mode changes into Rock Breaker. A powerful and long-ranged style that works best on the ground, it summons three large earth crystals from the ground to damage enemies.
 * Thunder Bolt: A swift mode change that unleashes powerful lightning upon attacks.
 * Fire Blazer: A ranged and versatile mode change that focuses the Keyblade to erupt flames while attacking.

Aqua

 * Magic Wish: Her own exclusive Mode Change; it seems to utilize the power of light to attack enemies, while enhancing her magic capabilities as well.
 * Diamond Dust: An ice-based style that seems to specialize in crowd-control and dealing with multiple enemies.
 * Thunder Bolt: A swift mode change that unleashes powerful lightning upon attacks.
 * Fire Blazer: A ranged and versatile mode change that focuses the Keyblade to erupt flames while attacking.

Ventus

 * Speed Rave: Ven's personal fighting style that puts a large emphasis on overwhelming enemies with wide-ranged, speed-based combos.
 * Cyclone: After meeting certain requirements, Speed Rave morphs into much more powerful Cyclone style, attacking surrounding enemies with spin attacks.
 * Thunder Bolt: A swift mode change that unleashes powerful lightning upon attacks.
 * Fire Blazer: A ranged and versatile mode change that focuses the Keyblade to erupt flames while attacking.
 * Wing Blade: Summons Swords around him, like Riku's Session Limit in KH2