In Super Street Fighter 4: Arcade Edition for the PS3 and Xbox 360, there is a new boss character you can fight in arcade mode named Oni, which is essentially a more powerful and more evil version of Akuma. Getting to fight Oni is similar to unlocking the Gouken or Akuma fights from the previous versions, but with slightly different criteria.
In order to fight Oni, you must play complete the following criteria in arcade mode: You can’t lose any rounds, you must get at least one Perfect Victory, ten First Attacks, and get five Super or Ultra Combo finishes. Once this has been met, you must beat Seth with a Super or Ultra combo.
If you are successful, Oni will come out to challenge you. Good luck, because you only get one shot to beat him.
