Game Dev Shane is a powerful trainer that can be found in the Even Badderlands after obtaining Gym Rank eight. He is the most powerful trainer in the game, with a diverse team of 6 level 99 starter Pokémon, making him the "Superboss" of This Gym of Mine.
When encountering Shane, he congratulates the player on beating the main story. He then requests that the player battle him when they are ready, with their "best" possible team. He offers the use of his computer to help the player organize their team.
Defeating Shane will grant the player 9999 reputation. He will also give the player the Shiny Charm, Oval Charm, and the "Dev Memento".