Short answers, pulled from the story.
Capcom Fighting Evolution is a 2004 video game that emerged from the wreckage of an earlier project called Capcom Fighting All-Stars. The title launched in arcades using Namco System 246 hardware before moving to home consoles later that same year.
Producer Yoshinori Ono stepped in to replace another producer who left during the middle of production for the cancelled 3D fighting game. Ono steered the ship toward completion by pivoting the original concept to preserve existing assets instead of rebuilding characters from scratch.
The playable roster includes four representatives from each major series excluding original character Ingrid and bosses Pyron and Shin Akuma. Characters originate from Street Fighter II, Darkstalkers, Red Earth, Final Fight, and Street Fighter Alpha with Guile appearing in his Street Fighter Alpha 3 form.
Online multiplayer on Xbox Live remained available until the 15th of April 2010 when servers shut down. Players can now access the game again through revival servers known as Insignia after the official service ended.
An official soundtrack titled Capcom Fighting Jam released on the 12th of December 2004 exclusively in Japan. Composer Noriyuki Asakura created the music while Maiko Kubo provided vocals for Ingrid's theme Heat Haze.