The Pokémon Watch or Pokétch (Japanese: ポケッチ Pokétch) for short, is a personal tool manufactured by The Pokétch Company for Trainers from Sinnoh, in the form of a watch with a touch screen. In Pokémon Diamond, Pearl, and Platinum, it is the navigational successor to the Pokégear and PokéNav, and is seen on the bottom touch screen of the Nintendo DS when the player is walking around. Pokétch screen aspect ratio

Aspect ratio

The aspect ratio of a shape is the ratio of its longer dimension to its shorter dimension. It may be applied to two characteristic dimensions of a three-dimensional shape, such as the ratio of the longest and shortest axis, or for symmetrical objects that are described by just two measurements,...

is 6:5 (Nintendo DS), and Pokétch has a 192 x 160 pixel (Nintendo DS).