Digimon Story: Lost Evolution is a hidden gem that rivals Pokémon HeartGold/SoulSilver in terms of mechanical polish. The English patched ROM transforms an unplayable curiosity into a fully realized JRPG.

Distributing the (the full game) is copyright infringement. Bandai Namco still holds the rights to Digimon Story: Lost Evolution . While they have never sued a fan translator, they have legally threatened ROM distribution sites hosting their games.

The story begins with a bizarre phenomenon: Digimon are losing their evolutions, regressing to their Fresh and In-Training forms. The protagonist, a new Tamer, must investigate this "Evolution Disaster" alongside a mysterious Digimon named Ririmon (a never-before-seen Digimon designed specifically for this game). The narrative revolves around restoring the "Evolution History" of the Digital World.