The in-game description for the Ability "Levitate" used since Generation IV states that it makes the Pokemon that knows it completely immune to all Ground-type attacks. However, this is false, because in all games since the Ability's introduction in Generation III, a Pokemon that has Levitate can still get hit and affected by non-damaging Ground-type attacks, such as Sand Attack. This means that the Ability only makes its Pokemon immune to damaging Ground-type attacks, such as Earthquake and Earth Power among others, and not ones that do not affect the Pokemon's HP.