#5 Jelly Pop *PM*: This item made the list because in Paper Mario, it can get a little difficult when both HP and FP are drained. Thanks Goodness there is a Jelly Pop. A Jelly Pop is and with Jammin' Jelly and Ultra Shroom. Together they make Jelly Pop, which recovers 50 HP and Fp. Very Reliable.
#4 Life Shroom *PM*: Ok no one can put this item down; the Life Shroom. It has saved everyone at least once. Even though it only revives 10 HP, that is a minor set-back. I think they should have more options but eh. This item is a must for everyone bag.
#3 Power Punch *TTYD*: To me, this is a great item but it gives you a boost of power, and actually last more then one turn. So to me, this can help you in a tight squeeze. I also have 2 or 3 of these on me.
#2 Mix Flower *PiT*: The Omega Fire Flowers of all. This can only do up to 999 HP, which is the set-back. But watching this thing grow is amazing. Hopefully you have quick fingers and good concentration, you'll need it, espically as it gets bigger, it will go faster. This is definitly a very good item.
#1 Copy Flower *PiT*: This has to be the GREATEST item ever! You have inifinite of you, and can do infinite damage. This is usually how I beat the final bosses. To have inifinite power is great, but in exchange for that, you need great hand-eye cordination. That is a small price to pay for that kind of item.