Hazards are a set of moves that affect Pokemon as they switch into battle, including Spikes, Stealth Rock, Sticky Web, and Toxic Spikes. They are set up on the opposing side of the field when used, and can be removed when a Pokemon on that side uses Defog or Rapid Spin, or is hit by Defog. Toxic Spikes can also be removed when a grounded Poison-type Pokemon switches in on the affected side.