Dialga is the mascot of Pokémon Diamond where it was found at the top of Spear Pillar. Because it resides in a different dimension, studying Dialga has proved to be difficult for those wishing to do so, as has trying to study its counterpart Palkia. The only way to summon a Dialga is to use the item known as a Red Chain. According to Pearl's PokéDex entry, many assume that time started once Dialga was born. It and Palkia were both created by an even more powerful Pokémon named Arceus.
Main Pokémon games
Other Pokémon games
Super Smash Bros. series
In the Wii video game Super Smash Bros. Brawl, Dialga, along with Palkia and Cresselia (take note, however, that these Pokémon would appear here at different times), appeared in the center of the Spear Pillar stage, where it would deliver one of many different attacks based on moves from the Pokémon video game series. The Lake trio also appeared here, though they had no effect on the gameplay.
"A Temporal Pokémon. This Legendary Pokémon is talked about as a deity in fables passed down through generations in the Sinnoh region. Identifiable by the diamondlike crystal in the center of its chest, Dialga is said to have set time in motion at the moment of its birth. Its fearsome Roar of Time attack is so powerful that it must refrain from attacking on its next turn."
In the anime
Origin and inspiration
The origin of Dialga (and Palkia) might be based on the Shinto legend of Izanami and Izanagi, who are said to have created an island with a spear and from there created the islands of Japan.