Pokémon Mystery Dungeon: Explorers of Time Tips

Saving up items
(I do this myself)
When you start the game you really cant do much but after a while after you have done a few missions you will have enough money to buy good items like reviver seeds so buy them and store them and dont touch them for the hidden land wich is very hard.If you are in a tight spot in the game you can take something out but not much. Just keep doing this and saving up your items and you will have loads of things for your journey in the hidden land

This helped me alot so i know it works
Hope i helped