Pokemon Sun & Moon Episode 138 English Subbed Episode Title:The Finals! Ultimate Rival Showdown!!.Episode Description: The Alola Pokémon League finals are underway, with Ash facing off against Gladion! Delia and Professor Oak arrive before the match—just in time to see Meltan evolve into the powerful Melmetal! Melmetal’s strength is awesome, and it takes Gladion and Silvally by surprise on the battlefield. But when Silvally changes into a Fighting type, it soon leaves Melmetal unable to continue. Ash sends in Pikachu, who manages to take down Silvally with a creative strategy, but our heroes are in for a surprise of their own when Gladion’s second battling partner, Lycanroc, is revealed to be Zoroark instead! Now it’s Pikachu versus Zoroark, as the battle continues!