An aimless wanderer from Orre
Generally a quiet and self contained person, he is more of an observer and commentator then a real participant in life. And that's how he enjoys it, drinking in the surrondings and discovering how the world around him works.
His homelife and environment made no attempts to instill in him any morality - it has only been through his travels that he has began to develope a (weak) sense of what is 'right' and what is 'wrong'. Good and evil are not important concepts to him, and although he does have a strong sense of pride and duty this does not automatically translate to right and wrong.
It is hard to attack him personally, although new environments, people and pokemon can easily confuse him if he is not given enough time to adjust. Anyone who teaches him without being condescending will gain a steadfast friend, especially if they say nothing of his illiteracy. Heck, if you don't point out he can't read he'll like you.
Years of harsh Orre sun has made him more or less heat proof. The same desert background has made him extremely appreciative of water, and he comes close to worshipping water pokemon. He adores greenery, growth and healthy environments, never tiring of the greens and blues of plants and water.
As far as items go, he has no sort of carrying item. The closest he can get is the many pockets of his pants, and his belt for his pokeballs.
Born and raised in the sweltering hell hole that is Pyrite Town of Orre, Elliot's upbringing was filled with... shady... events. Pyrite Town, even by Orre's standards, is a cesspool of human scum. Elliot's family was near the bottom of the grimy ladder of "Pyrite Life", with his parent struggling to keep their own bones together, let alone a child's.
Most of Elliot's time was spent being out of the way or fighting when he was not. Pokemon were almost as scarce as water, the only regular one-on-one interaction Elliot had was with the family's old dingy Sandshrew. Any battles in Pyrite were vicious and usually also involved the trainer fighting - Elliot had been on the recieving end of many a pokemon attack, both on purpose and by accident (spectating, whilst interesting, was always dangerous).
Elliot's average looking life of being beat up and barely surviving day to day took a turn for the better when he was given a 'scholarship' to another region as part of the 'Make Orre Less Crap' (unofficial name) scheme headed by local do-gooder Duking and his newfound contacts with the outside world.
Basically he got a free Abra Teleport to a region to start his grand pokemon journey without any prior information.