Before you enter Bubblegloop Swamp, go behind the entrance with the Wading Boots and enter the hole in the wall there. Follow the tunnel along and you will enter a snowy area. Go up the hill on the left and Beak Barge the icicle blocking the small tunnel. Now, go to Bubblegloop Swamp and change into a crocodile. Exit the Swamp, and go back through the tunnel in the wall and along to the snowy area. Go up the hill, enter the small tunnel and follow it to a small cavern. In here, you will find a spellbook who will tell you to enter the cheat "BLUEEGGS" in the sandcastle floor of Treasure Trove Cove. When you enter that code you will have a maximum of 200 eggs instead of 100.