Along with the release of the Japanese Pokedex from the Diamond and Pearl series, Several toy Poketches were packedged and eventually sold seperatly in 2006. These devices were never released in America but saw huge success in Japan. The original Poketch was modeled after the schematics put forth by the Diamond and Pearl series games. The second model was released in 2008 and designed after the Platinum Poketch and packadged alone. The devices themselves are watches that also have applications designed after those released for the Generation IV Sinnoh games.
Poketch Toy from Tomy
Poketch Toy from Pokemon Platinum released by Tomy