Typing isn’t involved in any of the Pokemon games that I’ve ever seen, but the upcoming Pokemon typing tutor game for the Nintendo DS, Battle & Get! Pokemon Typing DS, will come bundled with a Bluetooth keyboard.
The cartridge will have a built-in Bluetooth chip, since the DS itself doesn’t have Bluetooth. Our guess is that a game that comes with it’s own keyboard will not be a hit since kids want to play games, not type, but who knows. The Pokemon typing game will be released in Japan this April for an unknown price.