Pokemon: Yadoking no Ichinichi
English name: Pokemon: Slowking's Day
Genres: Fantasy
Type: Special, Episodes: 1
Aired: Jan 1, 2000
Studio: OLM
Source: Game
Rating: PG - Children
Synopsis:
It consists of nothing but Pokémon-speak--similar to the mini-movies that air with each theatrical movie. It's a short special based on life of the Pokémon Slowking.

(Source: Bulbapedia and Graffitti studio)