Among the files and data of the game, there existed a peculiar, unused character. This character was dubbed "Umbra," Latin for shadow. Umbra was unlike any character seen in the Sonic series; it was as if a dark reflection of Sonic had been created but never utilized in the final version of the game. The gaming community, always hungry for something new and exciting, latched onto Umbra. Theories emerged about Umbra's purpose and backstory. Some believed Umbra was an early prototype for Shadow, the hedgehog introduced in Sonic Adventure 2, while others thought Umbra could have been a rival character intended for Sonic 3.