List of Pokémon by index number (Generation IX)
In each Pokémon game of Generation IX, all Pokémon have an unseen index number used to identify them in the game's ROM. The majority of them are in their National Pokédex order, deviating starting with Dudunsparce, whose index number is 917 but its position in the National Pokédex is 982. Prior to version 1.2.0, there was no Pokémon with an index number of 980 or 987.
List of Pokémon by index number