Full Metal Body prevents the ability holder's stats from being lowered by an opponent's moves or abilities, such as Intimidate. However, it does not prevent self-inflicted stat reductions, such as those from using moves like Superpower or Hammer Arm. It also doesn't prevent stat reduction as a side effect of a burn or paralysis, or the moves Heart Swap, Guard Swap, Power Swap, Guard Split, Power Split, Baton Pass, or Topsy-Turvy.