Play as Grant
At the character selection screen, highlight Rock and press Left to highlight Grant. Press any button to select him.

Play as Kain
At the character selection screen, highlight Terry and press Right to highlight Kain. Press any button to select him.

Random fighter
At the character selection screen, hold Start. It is possible to fight as Kain or Grant randomly through this method.

K.O. taunts
Beat your opponent until he goes down, then quickly press Left + Start, Right + Start, or Right + Down before the "K.O." message appears.

Select victory pose
Immediately after defeating your opponent, press any attack button.

Artwork
Successfully complete Survival mode to unlock artwork, including the ending artwork for the character used to complete the game.