Pokémon Horizons: The Series

Roy and Uruto have been defeated in their battle against the Yellow Lucario nicknamed Yellow Blast. But as the two are about to challenge it to a rematch, Master Mayonnaise appears before them and suggests the two of them have a Pokémon battle instead! Uruto struggles due to his inability to be in sync with Yamirami...... Apparently the road to becoming the Mega Strongest will have many difficulties in store?!