Style Changes are a gameplay element in Kingdom Hearts 0.2 Birth by Sleep -A fragmentary passage-. They behave similarly to Command Styles from Kingdom Hearts Birth by Sleep in that they are techniques that enhance the user's physical combos.
Style Changes, like Command Styles, are activated by filling up a meter (in this case, three glowing markers) with physical combos. Once the meter is full, the player has a 30-second time limit to activate the Style Change with a Situation Command. The Style Change has a time limit for the user to dish out damage with it, but by filling the meter again with the Style Change, the player is prompted to activate the Style Change finish command.
List of Style Changes