Curse acts differently depending on whether the user has the Ghost-type or not. If the user changes type before using Curse, Curse will obey the user's type at the time of the move's execution.
The user will lose half of its maximum HP (rounded down) and put a curse on the target. If the user has less than half of its maximum HP remaining, the move will execute fully but cause the user to faint. A cursed Pokémon will lose ¼ of its maximum HP at the end of each turn. The curse will remain until the Pokémon switches out or the battle ends. This move is not blocked by Protect or Detect.
The user does not lose HP if Curse misses (due to a move with a semi-invulnerable turn) or fails (due to the target already being affected by Curse).
The user's Speed stat will drop by one stage and its Attack stat and Defense stat will rise by one stage each. Despite being an effect acting on the user, this move will fail if there are no opponents on the field.
By leveling upEdit
By prior evolutionEdit