In the core series games
When used from the Bag in a wild encounter, it attempts to catch the wild Pokémon.
In Pokémon Gold, Silver, and Crystal, while it is intended to be more effective against Pokémon that evolve by using Moon Stone and their evolutionary relatives, due to a glitch it always has a 1× catch rate. (Instead, the Moon Ball is more effective against Pokémon that evolve by using a Burn Heal, but there are no such Pokémon.)
Starting in Pokémon HeartGold and SoulSilver, if the wild Pokémon is part of an evolutionary family that includes a Pokémon who evolves by using a Moon Stone, it has a 4× catch rate modifier; otherwise, it has a 1× modifier. If used on an Ultra Beast, the catch rate modifier is instead always set to 0.1×.
The Moon Ball cannot be used in situations in which Poké Balls cannot be used, such as in wild battles with two or more opponents currently present or against a trial Pokémon. If used in a Trainer battle, the opposing Trainer will bat the ball away, wasting the item.
Fling fails if the user is holding a Moon Ball.
In Pokémon HeartGold and SoulSilver only, Moon Balls cannot be held. This is to prevent them being held by a Pokémon traded to Pokémon Diamond, Pearl, and Platinum, where the item does not exist.
|| A Ball for Moon Stone evolvers.
| A Poké Ball for catching Pokémon that evolve using the Moon Stone.
| A Poké Ball that will make it easier to catch Pokémon that can evolve using a Moon Stone.
In the anime
In the manga
- In Generation II, the Moon Ball's catch rate is mistakenly boosted when used on Pokémon that evolve using a Burn Heal rather than a Moon Stone, so in practice the rate is never boosted. In Generation I the Moon Stone's index number was 0x0A, but in Generation II this index corresponds to the Burn Heal (the Moon Stone instead having the index number 0x08)—the Moon Ball's code mistakenly references the Moon Stone's original index number, preventing the Moon Ball's boost from ever applying.
In other languages