To get a persons Ex mode you can either unlock it in Servial mode(Every 10 lvls is a new Ex the daredevil is the Ex) or the way which i think is faster is to compelete the 1st & 2nd paths in story mode. To get the Sp form you just have to finish all three paths of a person. For black when you have the Sp of a person hold L1 then press start. Its for infinite specials.