Defog is a Flying-type move that lowers the opponent's evasiveness by one stage.
Defog clears away entry hazards on both sides of the battle field. These include Stealth Rock, Spikes, Toxic Spikes, and Sticky Web. However, Defog clears Aurora Veil, Reflect, Light Screen, Safeguard, and Mist from the opponent's side of the field.
Defog also clears terrains off the field. That includes Electric Terrain, Psychic Terrain, Grassy Terrain, and Misty Terrain.
By Egg Move