The Pokéblock Case (Japanese: ポロックケースPolock Case) is a Key Item introduced in Generation III. It allows the player to store Pokéblocks made with a Berry Blender. In Generation III, it was formatted as POKéblock Case.
The Pokéblock Case was first featured in Now That's Flower Power!, in which May received one from Mr. Big, who said that every Pokémon Coordinator should have one. Being a former Coordinator himself, Mr. Big talked to May about the importance of planning a Pokémon's diet and explained that different Berries can be used to produce Pokéblocks.
In Reuniting for the First Time!, Chloe received a Pokéblock Case from Lisia after she had scouted her for a potential performance at the Lilycove City Contest Spectacular.