What is Arceus's National Pokédex number?

Arceus's National Pokédex number is 493.

Arceus is a Mythical Pokémon introduced in Pokémon Diamond and Pearl. It is listed as number 493 in the National Pokédex, placing it at the end of the fourth-generation group that begins with Turtwig at number 387.

The Pokémon is associated with the creation mythology of the Pokémon world. Its signature ability, Multitype, changes Arceus's type depending on the Plate item it holds, making it one of the franchise's most distinctive legendary or Mythical Pokémon.

The number is sometimes confused with Arceus's Sinnoh Pokédex placement or with other late-generation entries. National Pokédex numbers are a separate global ordering system, and Arceus's number remained 493 even as later generations expanded the full Pokédex.