These will increase Mike's total hearts by one and then refill all of your energy.
Caesar's Hut Pizza
Picking up one of these refills two of Mike's hearts.
Hammer and Chisel
Bottles of medicine that can be collected and used any time during the dungeon. Each use restores five hearts.
Picking up one of these refills four of Mike's hearts.
A single heart that is dropped by enemies which refills one of Mike's health containers.
The stars are sometimes dropped by enemies. Collecting five of these will refill one of Mike's health containers.
Try Your Luck Sign