Flynn was working on an experimental project that was not sanctioned but gave it up when one of his experiments failed during battle. Gemma found the project and upgraded it along with Flynn. They managed to convince Doctor K to use it, who was initially against it, but it backfired against the Rangers as it had too much power. Flynn came up with the idea of transferring its excess power into the other zords and managed to save the day. The zord can transform to human form and become giant, it takes a special Engine Cell.