The Map to Arkus is an item in Skylanders Academy Season 3 that tells the location of the Lost Island of Arkus. King Pen's ancestors hid the map at Skylanders Academy to keep it from getting into the wrong hands.
Strykore sought the map to find the island in order to gain the Iron Fist of Arkus and use it to destroy the Core of Light. Dark Spyro was enlisted to infilirate Skylander Academy to find the map within its walls. Eventually he discovered that it was inside a Wumpan Puzzle Box that could only be opened by someone who is true of heart.