JACKAL

In a two player game, right when your partner is losing his
laft life, rty pressing buttons A and B on your controller
at the same time. If your timing is perfect, he may get 
hundreds of extra lives!

The end:
At the end of the 6th stage you'll see an elevated tower. Hit it 
directly in the center with your explosives and a tank will appear.
Dodge its fire and hit it with your explosives to wear it down.