EarthBound
Vitality is a stat in EarthBound that determines HP gain. The amount a character's Vitality increases when he or she gains a level determines how much HP the character will gain in the same level-up, with one Vitality point corresponding to about 12 HP.
Vitality can be increased by having a character consume a Vital Capsule or a Rock candy.
Poo's Vitality goes up by 1 and his Maximum HP rises with it.