Sky Pillar is a tall, ancient structure located in the Hoenn region of the Pokémon world. It serves as a key location in the games Pokémon Emerald, Pokémon Omega Ruby, and Pokémon Alpha Sapphire. The tower is known for its unique architecture and is home to various wild Pokémon, including the legendary Rayquaza. In the storyline, the Sky Pillar plays a crucial role in the conflict between Kyogre and Groudon. Players must navigate through its floors to reach the top, where they can encounter Rayquaza and resolve the battle between the two legendary Pokémon. The tower is also significant for its connection to the lore of the Hoenn region.