Pokémon the Series: Sun & Moon Episode 4: First Catch in Alola, Ketchum-style!
Episode 4 of 146 of Pokémon the Series: Sun & Moon, aired November 24, 2016, 25 minutes. Available with English subtitles and dub where released.
Episode summary
Ash is on the verge of catching his first pokemon, as team rocket stoops in to ruin the day