Deoxys

Deoxys (デオキシス, Deokishisu, pronounced /di'ɑks.ɪs/) is a fictional creature in the Pokémon media franchise.

Creature description
Deoxys is one of two "Secret Rare" Legendary Pokémon in the Third Generation like Mew and Celebi, the other being Jirachi. It is unique species among Pokémon in many ways; Deoxys are humanoid aliens from outer space that began as an extraterrestrial virus and mutated into a sentient being when exposed to a laser of some sort. Its brain is located in its torso behind the blue crystal, and from it it can launch devestatingly powerful Psychic-type attacks.

Deoxys' viral nature is reflected in its unique ability to assume one of four distinctive configurations at will. Its Normal Forme is the most humanoid, where the two tentacles comprising each arm can be morphed into one functional, elastic arm and hand each, and already it has immense offensive statistics. Its Attack Forme gives it a more pointed appearance and turns its two arms into four imposing, sharp tentacles, and it has the highest offensive statistics of all Pokémon at this point. Its Defense Forme gives it more bulk and turns its arms into thick slabs that can block attacks, and it has huge defensive ratings. And its later-introduced Speed Forme causes it to lose the most body mass and have only two small tentacles for arms. Most of its statistics become average but it has a completely unsurpassed agility rating. By coincidence, if it's Normal Forme, Attack Forme, and Defense Forme are put together, it will create DNA, each of the letters standing for each of those three and that Deoxys is a DNA pokemon, but since Speed Forme was added later on, the coincidence in it changed.

As a Poké Ball Pokémon
The Attack Forme of Deoxys appears in Super Smash Bros. Brawl. When it comes out of its Poké Ball, it will fly upward and shoot a powerful Hyper Beam downwards, sending anyone that touches the beam to go flying with force, and if the opponent is close enough, it can suck them in with a strong force.