How to earn lots of money, and to get many important items.
You may need an Escape Orb. Go into a dungeon with about 20 floors, and pick up every item you find. If you have run out of space in your Toolbox, stand over the item you want to pick up, press B, select Ground, then choose Switch. Then choose an item from your toolbox to swap with the item on the ground. It is best to choose a berry or a seed, as these are the least important of your items (one exception--don't choose your Reviver Seed if you have one). Bands, Scarves and TMs are worth the most. After them come Orbs. Remember, don't put your Reviver Seed on the floor and exchange it with an Oran Berry!
Either complete the dungeon or use your Escape Orb. Go to Kangaskhan Storage and store all the items that are important and you might need in the future. With the rest of the items, go to the Kecleon Shop and select "Sell All" and Kecleon will make an offer. If the offer is good enough, choose "Yes" and you will get lots of money. Store it in Felicity Bank so you don't lose it.
REPEAT UNTIL YOU HAVE ENOUGH MONEY TO BUY ALL THE FRIEND AREAS AND AS MANY SHOP ITEMS AS YOU PLEASE!!!
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