See Batman versus the Penguin HEX-code here!

For infinite health in this game, use the DOS utility DEBUG. First backup
your game to be edited, then type the following from the DOS prompt:

ren penguin.exe cheater.cht
debug cheater.cht
e 4f2 90 90 90 90
Then type:
w
q
                                        
Then rename CHEATER.CHT back to its previous name.