Vanguard Princess is a freeware versus fighting game created with Enterbrain's 2D Fighter Maker engine, featuring the sort of quality normally reserved for full-price commercial releases. There are ten playable characters to choose from, an assortment of special moves distinct to each combatant, excellent sprite work, creative costume designs, and even a multiplayer mode that is unfortunately limited to just two people playing on the same computer with no online capabilities. Depending on your interest in the genre you could still squeeze out an hour's play or two from it, although the end sequence for every character is practically the same.

The game will only work on Windows operating systems which can read names of files and folders in Japanese, or those that already have the Japanese language pack already installed (XP instructions, or use AppLocale). You can switch between full screen and windowed mode by using the left Alt and Enter key, while the button configuration option is accessible via the menu bar. (source: Canned Dogs)

Author's web site
Vector information page
direct download link
moves list
AppLocale instructions (by TC-man)
Vanguard Princess wiki