Valor Form

Valor Form (Brave Form in the Japanese version) is the first Drive Form attained in Kingdom Hearts II. This form is obtained along with Sora's new clothes at Yen Sid's Tower. Sora merges with Goofy to transform. The form turns Sora's clothes into a red and black color scheme with a fleur-de-lis on each sleeve and pant leg. In this form, Sora wields two keyblades. This form focuses on attack, and is the most offensive of any form. Valor Form allows Sora to get in close and bash away to do heavy damage in a short amount of time, at the cost of losing the ability to cast magic.

While in this form, Sora can run faster than usual, making Valor the second fastest Drive Form, compared to Final's gliding ability.

This form also gives Sora access to the Star Seeker Keyblade until he obtains the Keyblades Hidden Dragon or Hero's Crest.

Leveling Up
The Valor Form has the easiest way to level compared to the others. It levels up simply by landing successful hits on an enemy, and Valor Form has a very long combo.

By leveling up the Valor Form, Sora will develop the ability High Jump, which allows him to jump at unreachable heights.

Support
Pros
 * Good enhancement in strength and overall stats.
 * EXPs can be gained as Sora strikes enemies, thus making it the easiest Form to level-up.

Cons
 * Magic is disabled. However, this can be mitigated should Donald serve as a healer.

Trivia

 * If one uses a cheat device to get this Form while still playing as Roxas, they will discover that Dual-Wield Roxas and Valor Form have the same abilities.
 * Oddly, despite that Magic can't be used, Sora still gets an MP boost.
 * When in Halloween Town, the usual pumpkin-mask changes to a devil-mask, slightly remniscent of the mask Lock wears.
 * Kairi transformed into Valor Form, with her dress changing from her normal pink to red, her own Keyblade replaced by Oathkeeper and Oblivion, in her appearance in the fanmade CG movie Dead Fantasy II.
 * Arguably, Valor Form is one of the more useful forms, due to its good strength and speed, as well as leveling up easily and not requiring many Drive Levels. This makes it very valuable right up to the end of the game.