Arceus

Arceus (アルセウス) is a Normal-type Mythical Pokémon that was introduced in Generation IV of the Pokémon games. In Super Smash Flash 2, Arceus appears as one of the many Pokémon that can be released from a Poké Ball to aid the player.

Pokémon description
Arceus is a white equine resembling a qilin or centaur with a gray, vertically-striated underside. The striated pattern has similar recurrences on the underside of its mane, tail, and face. Its four pointed feet are tipped with gold hooves. Its long mane juts away from its head, and its face is gray, with green eyes and red pupils, and a green circular pattern below its eyes. Arceus also has a streak of gold coloration on its head, and ears that point upward. Its neck is fairly long, with two pairs of extrusions to the sides, and a flap-like feature on the neck's underside that is colored white like much of the body. Arceus also has a golden cross-like wheel attached to its body by its round abdomen, which changes color along with its eyes and hooves based on its current type, which depends on the plate or type-specific Z-Crystal that it wields. The wheel also has four jewels attached to it. The pattern of striated gray of Arceus's underbelly resumes past Arceus's waist. Its limbs have gray undersides and extrusions at the tops of the legs. Arceus's tail is fairly like its mane in terms of shape and coloration. According to legend, it shaped the Pokémon universe using its 1000 arms.

Arceus is thought to have created the Sinnoh region and possibly the entire Pokémon world, the lake guardians Uxie, Azelf, and Mesprit; and the creation trio Dialga, Palkia, and Giratina. Because of this, Arceus is thought to be one of the most long-lived of all Pokémon species. It has the power to recreate the creation trio as well, presumably to guard the dimensions when a Trainer has caught one of them. According to the anime, its power can also bring back things that it once destroyed, make certain things vanish into thin air, or to halt time.

In Super Smash Flash 2
As stated above, Arceus can be released from a Poké Ball in Super Smash Flash 2. Once summoned, Arceus will lift its front legs into the air and use the move Gravity, in which it produces a large shockwave that causes airborne opponents to quickly plummet downwards. The range of the shockwave spans the entirety of the stage, and Arceus produces this shockwave several times before disappearing.