Grampa

Wylie is a character of the day who appeared in An Appetite for Battle!.

As Wylie came home, having just won a village tournament, he was challenged to a battle by his wife Carrie to settle a quarrel they had earlier. Not having a lot of confidence in Carrie's battling skills, he accepted the challenge. For the battle, Wylie chose to battle with his Delphox, while Carrie chose to battle with a Chespin she had found sleeping on their doorstep earlier.

Wylie's match against his wife ended after Clemont intervened and explained that the Chespin actually belonged to him and that it had run off. Wylie concluded that he had won the battle, since Chespin wasn't officially Carrie's Pokémon. However, Chespin still wanted to continue battling, and with permission, Clemont continued in Carrie's place. Despite this, Clemont's match was suddenly called off and declared a draw after Wylie injured his back while ordering Delphox to use Mystical Fire.

Carrie brought her husband inside to rest. The couple explained that their argument started when Wylie made a snide comment during dinner, and in response, Carrie took his bowl away. To make up for his comments, Wylie had bought her a cake. Accepting his apology, Carrie proposed to Ash and his friends that they enjoy the cake together. Wylie and Carrie said their farewells to the group as they continued on their way.

(Source: Bulbapedia)