M.A.T.A. Secret Files is a series of stories taken prior to the series. It can be seen in the Ejen Ali magazine.
The content in M.A.T.A. Secret Files is similar to the series: dark and serious. It mainly talks about the history of the characters. Ain Hafizah, the artist of M.A.T.A. Secret Files, says that all of these stories are crucial links to the series but never made it into the final product of the episodes (mainly due to time constraints).