Extra shield:
Move Louie half way across the screen when starting any level. Pause
game play and press B. If Louie is in the correct position, an extra
shield will be added. The text "Shield Awarded" will appear at the
bottom of the screen to confirm correct code entry.

Extra shield (alternate):
Wait until "299" appears on the clock, pause your game, and press B.
REMEMBER: This method may not work in higher game levels.

Unlimited money and extra items:
Locate a shop that has a red $5 money bag on the same screen. Collect
the money, enter the shop, then exit. The money bag will appear
again. Collect the money and repeat this procedure increase your
funds. Buy extra lives for $35 each if time runs out during this
trick. Up to nine shields at $10 each may also be collected with this
procedure.