To unlock the following wrestlers, simply beat the game in the idicated championship modes of play:

Beat Tag Team Championship: Unlock Meng & Barbarian(The Faces of Fear)

Beat US Championship: Unlock Curt Hennig(accompanied by the late, great ''Ravishing'' Rick Rude)

Beat Cruiserweight Championship: Unlock Billy Kidman

Beat TV Championship: Unlock Kanyon and Mortis (By pressing left or right C buttons to change the costume on the wrestler select screen, you'll get 2 different versions of the wrestler, Mortis, who was Kanyon's old personality in WCW)

Beat World Championship: Unlock Rowdy Roddy Piper

Other wrestlers not unlocked by beating championship mode:

THQ Man: Press Top or Bottom C on the wrestler select when AKI Man is highlighted to play as THQ Man