When the Takara logo appears , press Right, Left, A , B, and Up. Now you can play as the boss.
Jet Mode
On the title screen, press Ux2 SELECT A Dx2 SELECT B. There will be a sound, the logo will change shade, and the game will now increase in speed.
Scorcher Mode
At the Takara logo press Right, Left, A, B, Down, A, B, and Up. You will hear a click sound if down correctly. Scorcher mode allows you to blast your enemies with your characters super attacks at any time. It also allows you to select Zeus as a character and select fighting styles in Training and Tournament modes.
Test Mode
On the Takara screen, quickly press: Up, B, A, Down, B, A, Left, Right.