Start Chapter 2-1 under any difficulty setting with an online friend. Note: You must have eggs to do this trick. Start your game with your partner and have whoever has the eggs drops out of the game, leaving all the eggs to the AI character. Have the other person then request all of the eggs from the AI character and complete the level, making sure that the game saves. Then, go back into the game with your partner at the same level, making sure that you have the eggs in every inventory slot. Then, drop out, leaving all the eggs to the AI. Have your partner request all the eggs, then finish the level. The eggs will multiply each time you do this and you can sell them for 2,000 gold. This is a way to receive a huge amounts of money to buy whatever you need. You can repeat this as many times as desired.