How do you unlock all the hidden characters in Dead Or Alive Dimensions

Beating the arcade mode and chronicle mode wont do anything :P, you have to beat the tag challenges to get them at about challenge 18 the characters will start rolling in, when you beat all tag challenges, you can become Shiden

Goto the Random slot in character select screen
Press and Hold L+X, then press A (Shiden Costume 1)
Press and Hold R+X, then press A (Shiden Costume 2
Press and Hold L+R+X, then press A (Shiden Costume 3)