More than 100 previously unrevealed Pokémon designs from the development of Pokémon Diamond and Pearl have surfaced online, giving fans a rare look at early concepts, abandoned creatures, and scrapped evolutions from the creation of the Sinnoh region.
The designs come from a long-lost internal documentary created by Pokémon developer Game Freak during the development of Pokémon Diamond and Pearl. Originally distributed only to studio employees on DVDs and intended as a private record of the team's work, the documentary was never publicly released until now.
Among the newly discovered material are early versions of existing Pokémon, unused evolutionary lines, and completely abandoned concepts. Fans have spotted discarded evolutions for Delibird and Kecleon, possible pre-evolutions for Stantler and Lapras, as well as designs resembling baby versions of Plusle and Minun.
The footage also reveals a wide range of Pokémon concepts that never made it into the final game, including creatures inspired by cranes, crickets, snails, molluscs, goats, mice, platypuses, and swordfish. Some unused plant-based ideas, such as bean sprouts and clover Pokémon, were also shown.
The documentary even includes alternative designs for Sinnoh's starter Pokémon. Among the early concepts are a Water-type dog-like creature with a foam-covered head and a Grass-type wolf design, offering a glimpse at how different the region's final lineup could have been.
The discovery was made possible after the documentary was obtained and carefully reviewed by a group of Pokémon fans, with an extensive archive of the footage compiled by the fan archivist Lewtwo. The full documentary has since appeared online, including a version uploaded to YouTube and a more permanent archive through the Internet Archive.
The release has generated significant excitement within the Pokémon community, largely because of how much behind-the-scenes development material the documentary contains. Unlike official promotional content, the footage was created internally for Game Freak staff, providing an unfiltered look at the company's creative process.
Nearly an hour of footage shows developers working inside Game Freak's offices, along with the team's approach to building the Sinnoh region — from early sketches and paper maps to physical models created with blocks. For many fans, the documentary represents a rare piece of gaming history, capturing how one of Pokémon's most popular generations was developed.
Access to Game Freak's design process has traditionally been extremely limited. In recent years, one of the few comparable sources of unreleased Pokémon information came from the controversial Pokémon Teraleak, which originated from an illegal breach of Game Freak's internal data. Unlike that incident, this documentary provides a legitimate look at the studio's own development archive.
The footage may also contain clues about ideas that could eventually return in future Pokémon projects. Previous generations have reused concepts from abandoned designs, with some early ideas eventually evolving into official Pokémon years later. The documentary, for example, includes creatures that resemble the eventual designs of Pokémon such as Rowlet and Sandygast.
One design that has particularly caught fans' attention is an unused yellow Shellos concept. Some fans believe the design could potentially appear in future games, following its mention in Pokémon Pokopia and speculation surrounding the upcoming Pokémon Winds and Waves for Switch 2.
While many of the revealed Pokémon may never become official additions to the series, the documentary offers one of the most detailed glimpses yet into Game Freak's creative process and the many ideas that shaped — and were ultimately left behind by — Pokémon Diamond and Pearl.