Pokemon Prism: Summer 2010 Beta (Gold hack)

Pokemon Prism is one of the most ambitious and famous fan-made hacks in the history of the series, developed for almost a decade.

The summer 2010 beta is an early public snapshot of the project for the Game Boy Color, which already included the new Naljo region, original Pokemon and new mechanics. Even in unfinished form, the hack showed a quality comparable to Game Freak's official releases for the GBC.

It is a curious piece of history for fans of Pokemon hacks.