Pokémon Channel, released in Japan as Pokémon Channel ~Together With Pikachu!~ (ポケモンチャンネル ～ピカチュウといっしょ!～ Pokémon Channeru ~Pikachū to Issho!~, lit. "Pokémon Channel ~Together With Pikachu!~") is a virtual pet video game for the GameCube, developed by Ambrella. Its focus is the adventures the player has with Pikachu, most of them involving a new television network. The game can be considered the spiritual sequel to Hey You, Pikachu!.
Professor Oak is developing a network that can be enjoyed by both Pokémon and their Trainers. The player has been chosen as a beta tester for the network, and is given a TV to watch the programs on. A television-loving Pikachu, seeing the TV being delivered, takes an interest in the TV and follows the Magnemite delivering it to the player's in-game house. As the network is to be enjoyed by both Pokémon and humans alike, the Pikachu becomes a beta tester as well. As the game progresses, the Pikachu grows closer to the player, and can be nicknamed early on in the game.
The game uses the GameCube's internal clock to count real time as game time. As days progress, more channels become available, including the serial Pichu Bros. show.
Source: Wikipedia, "Pokémon Channel", available under the CC-BY-SA License.