From Bulbapedia, the community-driven Pokémon encyclopedia.
Berry Tree (Japanese: ある ひ もりのなか One Day in the Forest) is the name of a Pokémon-based e-Reader application. It is a minigame starring Ursaring. Four cards are required to play the Berry Tree application: Nidoqueen, Gligar, Growlithe and Ursaring.
In Berry Tree, the player takes on the role of an Ursaring. The player has to follow the button commands on the screen (similar to the way Clefairy Says is played) to shake Berries free from a tree. The Berries are picked up by two Teddiursa. The game is lost if the player does not shake enough Berries down from the tree within the time limit.