Until the target faints or switches, the user's Accuracy modifiers and the target's Evasion modifiers are ignored. Ghost-type targets also lose their immunities against Normal-type and Fighting-type moves.
Almost always goes first. The user is left with at least 1 HP following any attacks for one turn, but the move's success rate halves with each consecutive use of Protect, Detect or Endure.
On the first turn, the user bounces into the air, becoming uncontrollable, and evades most attacks. Gust, Twister, Thunder and Sky Uppercut have normal accuracy against a mid-air Pokemon, with Gust and Twister also gaining doubled power. The user may also be hit in mid-air if it was previously targeted by Lock-On or Mind Reader or if it is attacked by a Pokemon with No Guard. On the second turn, the user descends and has a 30% chance to paralyze the target.
The user sacrifices itself so that its replacement will be cured of status conditions and have its HP fully restored upon entering the field. This move fails if the user is the only non-fainted Pokemon on its team.