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Arceus (アルセウス, Arceus) is a fictional creature from the Pokémon series.
Arceus is a Mythical Pokémon introduced in Generation IV, and is listed at #493 as the final Pokémon in that generation's National Pokédex being categorized as the "Alpha Pokémon". In the Sinnoh mythos, it is considered the universe's creator, and the master of the generation's two legendary trios. By holding a matching Plate item, it can change its type from Normal to any other type in the game. Its signature move is Judgment, an attack which changes its type to match Arceus's current type.
Gravity is a non-damaging Psychic-type move introduced in Generation IV. When used, it applies a status effect to the battlefield for 5 turns, grounding every Pokémon on the field: this lowers the evasion of all Pokémon by two stages, removes any immunity to Ground-type moves and makes some moves like High Jump Kick impossible to perform. Arceus learns Gravity at level 10, but since every legitimately available Arceus has so far been obtained at a much higher level, Arceus requires a Move Reminder or Move Tutor to learn the move.
As a Poké Ball Pokémon
Arceus appears as a Poké Ball and a Master Ball summon. When summoned, it produces a large shockwave that acts as a powerful long-range meteor smash. It does so three times, with a short delay between each use, before disappearing. Only airborne players will be hit; grounded players are not affected. It does not cause damage, but it possesses very powerful set knockback, which is very likely to KO any off-stage opponent. However, opponents can potentially DI towards a stage wall, allowing them to tech and survive. The launch rate can affect how powerful the attack is.
When Arceus is out, CPUs will prefer to stay grounded. If they are on a platform far away from other fighters, they will remain there, spamming attacks.
A Pokémon said to have hatched from an egg that appeared from nothing. Newly hatched, it created the world and the sky. Its Gravity attack will bring any fighter in midair crashing down to earth. No ground below you? Looks like you're going to go plummeting off the stage as if you'd been hit by a Meteor Smash!
As a Poké Ball Pokémon
Arceus reappears as a Poké Ball and Master Ball Pokémon. The knockback dealt by the attack is no longer set.
Arceus cannot be summoned on Arena Ferox, Balloon Fight, Brinstar, Corneria, Dream Land GB, Jungle Japes, Living Room, Magicant, Onett, Reset Bomb Forest, Spirit Train, Super Mario Maker, Suzaku Castle, Tortimer Island, Wario Ware Inc., or Yoshi's Island.