Enter the password 0894

After Higgins gets hit by the coconut at the title screen press right, left, right, left, A, B, A, B.

In the third area of the first island, after you pass the frog, climb up the ledge and drop down on the other side. When you land there, jump and an egg will be revealed. Hit the egg and a key will appear. Retrieve the key, and a platform will appear under you and take you to a secret room. Here a dragon will give you the Hudson Bee, which will allow you to keep all of your hammers and dinosaurs if you die.

Near the end of the first level, before a sign that says ''G'' on it, jump up at the edge of the cliff that's after the platforms. If you find an egg (that contains a bee), you know you've done it. At any Game Over screen from now on, hold UP, A, and SELECT. Then press START. You should repappear in the start of the level you died at with some extra lives. This game has a few versions and the code only works for some versions, oddly enough.

When you are at the main menu, you can put in a code that let you teleport to any other world (1-8).

The code:

When you defeat the first boss, pause the game as the first boss leaves the screen. You'll be able to see the next boss.