Luggage pet for Tourists. Has very high carry capacity and doesn’t drop items of its own accord. Fights like a normal pet. Either it is immune to damage but has a low maximum level to compensate, or if overwhelmed, it doesn’t die but instead turns into a normal “luggage” object that will eventually reanimate.

The common suggestion along these lines has been to give tourists the Luggage as their starting pet, but the common criticism of that idea is that it makes Tourists far too powerful from the outset. Instead, a possibility is that you can trade the Platinum Yendorian Express Card to Twoflower in exchange for the Luggage. (The Card then vanishes, so you can’t arrange Twoflower’s death and get both).