Reach the fourth stage to face one of six opponents (Shingo, Eiji, Kasumi, Rugal, Orochi Iori, or Orochi Leona). Your opponent is determined by the amount of DM and SDM finishes as indicated below you get before the fourth stage. The team you fight before the final Boss determines who the final Boss will be. If you get the Orochi Team, you will face Orochi. If you fight the '96 Boss Team, you will face Goenitz. If you fight either the Iori team, the USA Sports team., or the Masters team, you will take on Rugal.
BOSS - HOW TO UNLOCK Eiji or Kasumi - Have three to five DM or SDM finishes by the fourth match. Goenitz - Have three to five DM or SDM finishes by the final match. Omega Rugal - Fail to meet any other requirement. Orochi - Have six to nine DM or SDM finishes by the final match. Rugal, Orochi Iori, or Orochi Leona - Have six to nine DM or SDM finishes and do not lose any rounds by the fourth match. Shingo - Fail to meet any other requirement.