Wonder Guard's effect is that its user impervious to not very effective and normally effective moves. If the moves does no damage, it can work. It also doesn't prevent indirect damage like status effects, weather, recoil and entry hazards. Wonder Guard cannot be Skill Swapped or copied by Role Play but it can be Traced. Wonder Guard can be overwritten by Simple Beam, Worry Seed, Entrainment or Gastro Acid. Entrainment can also grant the ability to a target if used by one with this ability.