new features is a meter known as the "Drive Gauge". The Drive Gauge has dual functions: to transform Sora into a "Drive Form" or to summon a special character. While in a Drive Form, Sora bonds with party members to become more powerful and acquire different attributes; all but two Forms also allow the use of two Keyblades. When a Drive is executed, Sora's combat statistics are heightened. Drive Forms also give Sora new abilities that can be used in normal form, called "Growth Abilities." Sora's first two Drive Forms only combine power with one party member; later-obtained Drive Forms require him to bond with both party members. When allies are used in a Drive, they are temporarily removed from battle for its duration. Unlike the HP and MP gauges, the Drive Gauge is not refilled at save points. Like in the first game, Sora can summon a Disney character to aid him in battle. Summons will replace the two computer-controlled characters and fight alongside Sora for as long as the Drive Gauge allows, or until Sora's HP runs out. Instead of being limited to only one action, Summons now have a menu of their own and are capable of performing solo or cooperative actions with Sora. These actions are performed by pressing the triangle button. The Summon ability and each Drive Form are leveled up separately and by different criteria; obtaining higher levels allows for extended use and in the case of Drive Forms, access to new abilities. Plot Setting Kingdom Hearts II begins one year after the events of Kingdom Hearts and Chain of Memories. The game's setting is a collection of various levels (referred to in-game as "worlds") that the player progresses through. As in the first game, the player can travel to various Disney-based locales, along with original worlds specifically created for the series. While Disney-based worlds were primarily derived from the Disney animated features canon in the first game, Kingdom Hearts II introduces worlds that are based on live-action franchise Pirates of the Caribbean as well. Each world varies in appearance and setting, depending on the Disney film on which it is based. The graphics of the world and characters are meant to resemble the artwork style of the environments and characters from their respective Disney films. Each world is disconnected from the others and exists separately; with few exceptions, players travel from one world