Shinji is a roaming Pokeacutemon trainer from the Sinnoh region. In the saga Pokeacutemon: Diamond amp Pearl he was first seen in the episode quotTwo Degrees of Separationquot though his full introduction was in quotWhen Pokeacutemon Worlds Collidequot. He is initially introduced as a powerhungry trainer that cares little about his Pokemon039s feelings and more for their strength. Because of this Ash is determined to prove his doings wrong thus starting their long rivalry. At the conclusion of their last sixonsix battle Ash finally comes out victorious thus marking the end of their rivalry.