Pokemon Best Wishes! Season 2: Decolora Adventure - Dent to Takeshi! Gyarados no Gekirin!!
Genres: Action, Adventure, Comedy, Fantasy
Type: Special, Episodes: 1
Aired: Oct 3, 2013
Studio: OLM
Source: Unknown
Rating: PG - Children
Synopsis:
Dent and Takeshi! Gyarados's Outrage!! is the first spin off of the Best Wishes series of the Pokémon anime.

(Source: Bulbapedia)