Lunar Dance causes the user to faint, but restores the HP and PP of the Pokémon that is sent out to take its place as well as removing all status conditions (except fainting). If the user moves before the opponent, the restored Pokémon is then sent out before the end of its turn.
Generation V to VII
The receiving Pokémon is now sent out at the end of the turn after all other Pokémon have moved.
If powered up with a Psychium Z into Z-Lunar Dance, the move will gain no additional effects.
Generation VIII onwards
In Versions 1.0 to 1.2.1 of Pokémon Sword and Shield, Lunar Dance could not be selected in a battle. Starting with Version 1.3.0, it is usable.
If the Pokémon sent out to replace the user already has full health, no status condition, and full PP, Lunar Dance's effect will not activate until a Pokémon is placed in that position (either by switching in or using Ally Switch). A pending Lunar Dance will not activate if a Pokémon already in that position loses HP, gains a status condition, or loses PP; it will only activate when a new Pokémon is placed in that position. Each position can only have a single instance of Lunar Dance pending (using it multiple times does not stack). Lunar Dance can stack with Healing Wish.
Restores the HP of all allied sync pairs other than the user by approximately 20% of their maximum HP. The higher the user's move level, the higher this percentage is. (Each additional move level increases the amount of HP restored by 5%. The maximum HP restoration is approximately 40% of their maximum HP.) Removes all status conditions from all allied sync pairs. Removes the confused, flinching, and trapped conditions from all allied sync pairs. Charges the user's move gauge by 6.
It heals teammates' HP, PP, and bad status conditions, but it reduces your HP to 1.* It restores your teammates' HP and heals their bad status conditions. It also slightly restores their PP. But it depletes your HP to 1, so be careful!*
In the anime
The user faints. In return, the target is fully healed.
Cresselia's tailfin glows white, while her body becomes surrounded in a light blue aura. An image of a crescent moon then briefly appears over Cresselia as sparkling blue lights rain down on the target, fully healing it. After using the move, Cresselia faints.