Poo

Poo, the final protagonist of EarthBound.  He starts out on his own much like Jeff - but unlike the other three kids, Poo starts out at Level 15 instead of Level 1.  Poo is a prince in the land of Dalaam, and has psychic abilities much like Ness and Paula.  He also had to go through some enduring punishment in training (which involved him having his legs broken, his arms torn off, his ears cut off, and his eyes stolen.  This doesn't actually happen on-screen (as it's a text-based RPG), but just the thought of it makes me shudder.  Poo is also a tad different compared to the other three - he can only equip certain items, otherwise if he tries to equip say, a baseball bat (which Ness usually uses), his attack will drop.  And there's exactly four items that Poo can equip (one of which you have a 1/128 chance of getting from one particular enemy).