Pokémon the Series: Sun & Moon Episode 22: A Shivering Shovel Search!
Episode 22 of 146 of Pokémon the Series: Sun & Moon, aired April 13, 2017, 25 minutes. Available with English subtitles and dub where released.
Episode summary
Ash and Kiawe are training with Litten on the beach as Pikachu and Rockruff play with a mysterious shovel that seems to be moving around on its own—until it rises out of the sand to reveal a dangerous Sandygast! When Rockruff attacks it, the shovel is launched into the sea, and the furious Sandygast evolves into Palossand and traps Ash and Litten inside!