CoroCoro Magazine leaked the pictures of Magiana. CoroCoro leaks are pretty accurate. I can't recall a time they were wrong on a leak(but someone could tell me if I am wrong).
Rules and Guidelines say "No Advertising" so I'm not going to post any links to any websites(not sure if it counts as advertising or not).
There were a few other imagines that involved Magiana.
Magiana will be in the new movie, which is called "Volcanion and the Ingenious Magiana". The movie summary from the magazine is "As Ash and his friends continue their journey, Volcanion drops down from the sky in front of them. Volcanion's object is to recover Magiana, who has been abducted by the "Azoth Kingdom", a city of super-machinery. However, Volcanion and Ash have become linked together by a strange chain. Will the two of them manage to work together and save Magiana?"