Play as Sonork
At the title screen when the word "Start" appears, press L, R, C-Up, C-Down, C-Left, C-Right. If you entered the code correctly, you will hear a sound.

Play as Demitron
At the title screen when the word "Start" appears, press A, B, R, L, C-Down, C-Up. If you entered the code correctly, you will hear a sound.

Play against Demitron
At the title screen when the word "Start" appears, press Up, C-Left, R, Right, Down, B(3), C-Up. If you entered the code correctly, you will hear a sound. Now a special Demitron vs. Demitron match will begin.

View character endings
Enter one of the following controller actions at the title screen when the word "Start" appears to view the ending for the corresponding character:

Aaron
Press Up, C-Left, R, Right, Down, R(2), C-Left.

Demonica
Press Up, C-Left, R, Right, Down, R(2), C-Up.

Demitron
Press Up, C-Left, R, Right, Down, L(2), C-Down.

Eve
Press Up, C-Left, R, Right, Down, R(2), C-Right.

Gore
Press Up, C-Left, R, Right, Down, R(2), C-Down.

Morphix
Press Up, C-Left, R, Right, Down, R(2), B.

Niiki
Press Up, C-Left, R, Right, Down, R(2), A.

Scarlet
Press Up, C-Left, R, Right, Down, L(2), C-Left.

Sonork
Press Up, C-Left, R, Right, Down, L(2), C-Up.

Zenmuron
Press Up, C-Left, R, Right, Down, L(2), C-Right.