The Death and Return of Superman
   

Boss tip
Refill energy and get 5 attacks
Skip a level


Boss tip

How to beat Doomsday, and all the other bosses really quick. Use your eye 
beams or hand blasts, etc.. Time them to connect when the enemy is almost 
to you. If done correctly you can then start wacking away till they fall down, 
and then repeat the process.


Refill energy and get 5 attacks

First Do the sound test in this order:
-05
-29
-2C
-05
Then play in the game press ABXY together to refill energy and get 5 attacks


Skip a level

Go to the Sound Test in the Options Menu and play these sounds in 
this order. 0b, 29, 2c, 05. Now while playing, press Y + X + B + A 
to get 9 lives and 5 special powers, or hold X + Y + B + A and press 
Select to skip a level.