Main article: List of notable ID numbers
Sometimes, there are special ID numbers assigned to Pokémon if they come from a non-standard Pokémon game or are received as a prize. Also, for Pokémon not yet hatched from their Eggs, the ID ????? is used. It will turn into the ID number of the Trainer who hatches the Pokémon. It is also used for unpurified Shadow Pokémon. Once purified, the ID number will change to that of the Trainer who snagged it.