Pattern Bush (Japanese: しるしのはやしSymbol Thicket) is an area exclusive to Pokémon FireRed and LeafGreen located on a small, offshore island to the north of Six Island. To reach Pattern Bush, it is necessary to Surf a short distance from mainland to the island, using the Water Path.
Pattern Bush is carpeted in a thick undergrowth, which makes it perfect for the multitudes of Bug-typePokémon who call this place home.
An intriguing aspect of Pattern Bush is the mysterious empty patches of ground. No reason for this phenomenon is given, although the Trainersbattling there have their own suspicions. It may be a reference to the Nazca Lines or crop circles. Looking at the overhead map causes the area to resemble an integrated circuit, or more specifically, a printed circuit board.
A colored background means that the Pokémon can be found in this location in the specified game. A white background with a colored letter means that the Pokémon cannot be found here.