Starving Traveler (空腹の旅人, Kuufuku no Tabibito, lit. Hungry Traveler) is an event in Tomba! 2: The Evil Swine Return.
Give the starving traveler something to eat.
Talk to the man inside the room above the first encountered save point in the Water Temple to activate the event.
The traveler will accept both Lunch Boxes and sandwiches. In order to give the selected item to the traveler, select it from the Item Screen when Tomba is standing in front of him. The event is cleared.