Just under 40 minutes to beat. No idea what the fuck I was doing control wise, but mashed through most of the game, switching characters until one broke through. Ive beaten other versions of these games in the past, and didnt really know how the controls worked back then either. The final boss took more deliberate actions. What worked best was to strafe around him in a circle, jump occasionally and use the fireball character I used. His fireball move has no homing but did very high damage. Get up close and spam the fireballs when the boss is vulnerable (opens up and changes brown) and you can kill him in one cycle.
Lost matches edited out. This may be a Japanese exclusive for the Xbox Live Arcade store but ran well on the Xenia emulator.