From Bulbapedia, the community-driven Pokémon encyclopedia.
Night Flight (Japanese: くらやみひこう Flying in the Dark) is the name of a Pokémon-based e-Reader application. It is a minigame starring Zubat. Only two cards are required to play the Night Flight application: Zubat and Golbat.
In Night Flight, the player takes on the role of a Zubat flying in a dark cave. The objective of the game is to make it to the end of the cave, avoiding wild Koffing by using Supersonic. Zubat can collect hearts inside the cave to increase the player's score. The game is lost when Zubat touches an enemy Koffing.