Play as Devilot, Dan, and Akuma

Play as Devilot
Player One should press and hold Start, then put the cursor on Morrigan, and press Down 13 times. When the timer reaches 10, press any button. Player Two should press and hold Start, then put the cursor on Felicia, and press Down 13 times. When the timer reaches 10, press any button. Now you can play as Devilot from the game Cyberbots.

Play as Dan
Player One should press and hold Start, then put the cursor on Morrigan, press Down 13 times, and press any button. Player Two should press and hold Start, then put the cursor on Felicia, press Down 13 times, and press any button. Now you can play as the "awesome" Dan.

Play as Akuma
Player One should press and hold Start, then put the cursor on Morrigan and press Left, Down, Left, Down, Left, Down, then hold Left, and press any button. Player Two should press and hold Start, then put the cursor on Felicia and press Right, Down, Right, Down, Right, Down, then hold Right and press any button. Now you can play as the powerhouse Akuma.