Legendsz-a Stories

Two brothers that specialize in the fighting and steel types respectively moved to Lumiose City several years before the events of Legends Z-A and partake in the Z-A Royale even after the Z-A Royale ended and became the Infinite Z-A Royale. But one day, the two brothers are spending time together when they come across a wild Lucario and the two brothers fight over who should catch it. Except this isn't the first time one of them has met this specific Lucario.