Pokemon Season 12 Episode 48 The Treasure Is All Mine!

As Ash prepares for his final Sinnoh region Gym Battle with a little training, his Monferno accidentally discovers a treasure chest buried in the forest! While struggling to open it, our heroes are approached by Team Rocket-in disguise, as usual. James remembers that he was the one who buried the treasure chest long ago! James and the rest of Team Rocket attempt to retrieve the chest, but to no avail.