Boss Codes- You can play as two hidden bosses if the following codes are entered at the title screen:
Sonork - L, R, Top-C, Bottom-C, Left-C, Right-C
Demitron and Sonork - A, B, R, L, Bottom-C, Top-C
Character Endings- These codes are entered at the title screen:
Aaron- Up, Left-C, R, Right, Down, R, R, Left-C
Demonica- Up, Left C, R, Right, Down, R, R, Top C
Demitron- Up, Left C, R, Right, Down, L, L, Bottom C
Eve- Up, Left C, R, Right, Down, R, R, Right C
Gore- Up, Left C, R, Right, Down, R, R, Bottom C
Morphix- Up, Left C, R, Right, Down, R, R, B
Niiki- Up, Left C, R, Right, Down, R, R, A
Scarlet- Up, Left C, R, Right, Down, L, L, Left C
Sonork- Up, Left C, R, Right, Down, L, L, Top C
Zenmuron- Up, Left C, R, Right, Down, L, L, Right C