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.
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 last; if an opponent strikes with a Physical attack before the user's turn, the user retaliates for twice the damage it had endured. In double battles, this attack targets the last opponent to hit the user with a Physical attack and cannot hit the user's teammate.
The user performs the battle's last successful move. This move could be from the current opponent, a previous opponent, a teammate or even another move from the user's own moveset. This move fails if no Pokemon has used a move yet. Copycat cannot copy itself.
