Pokemon Best Wishes! Season 2: Decolora Adventure - Dent to Takeshi! Gyarados no Gekirin!!
English title: Pokémon: Black & White: Adventures in Unova and Beyond - Cilan and Brock!! Gyarados's Outrage!!
Japanese title: デントとタケシ！ギャラドスのげきりん！！
Type: TV Special
Episodes: 1
Source: Unknown
Genres: Action, Adventure, Comedy, Fantasy
Studios: OLM
Producers: TV Tokyo
Duration: 23 min
Rating: PG - Children

Dent and Takeshi! Gyarados's Outrage!! is the first spin off of the Best Wishes series of the Pokémon anime.

(Source: Bulbapedia)