Pruning a Passel of Pals! - S11.E26

At night, Ash takes a walk near the Lake Valor with Pikachu when suddenly, something in the center of the lake begins to glow, and it turns out that Azelf appears. When Ash tries to approach it, the shadow disappears again. The next day, the second round of the Wallace Cup begins. May's Venusaur is then revealed, and there is a cameo appearance of May's Skitty battling in the second round. Dawn, May and Zoey make it to the semi finals but Ash loses to a tough coordinator called Kyle. After it is Dawn's turn to battle Kyle in the semi-final, she uses Piplup against his Crawdaunt. There are cameos of Norman, Caroline, Max, Kenny and Paul.