Sell unwanted items to get an unlimited amount of money. Then, invite a player back into your game, and repeat the process again to multiply the drop items. When the host's inventory is large enough, give the invited player your larger inventory, and have him or her leave with the quit option in the pause menu to save the invited player's now larger inventory. Invite a player back into your game, and repeat the process a few more times. Next, have the invited player force close the game to avoid saving his or her inventory. Invite the player back into your game, and have them drop the items you previously dropped for them. This will save the invited player's inventory. Then, have the invited player back out of the game with the quit option in the pause menu.
Have the invited player pick up all items you dropped. Drop any items that you want to duplicate.
