Pikachu

Pikachu is the mascot of the ever popular Pokémon series, made by Game Freak.

Super Smash Bros. Series
Pikachu appeared as a default character in Super Smash Bros. He was a useful player, as his electric attacks could inflict serious damage. However, his Quick Attack was his prize move, as he could escape almost every fall, if done correctly. However, he is rather light, and can be knocked off the stage easily.

Pikachu returned in Super Smash Bros. Melee, yet again as a default player. He retained all of his old moves, as well as add a new move, Skull Bash. However, his abilities are basically the same as the original. Pichu had a moveset similar to Pikachu.

Pikachu was one of the first characters revealed for Super Smash Bros. Brawl. He has been shown using Thunder Jolt, Quick Attack and Thunder. His Final Smash has been revealed as Volt Tackle. Pikachu has been voiced by Ikue Otani in all three games. She also voiced Pikachu in the Pokémon Anime.

Solid Snake Codec Conversation

 * Mei Ling: (overjoyed) Ooh, how cuute!
 * Snake: What? The yellow thing?
 * Mei Ling: That's Pikachu. It's a Pokémon. They're popular all over the world, you know. And it may look cute, but be careful, It can store up large amounts of electricity in those adorable little cheeks. It'll try to pepper you with electric shocks.
 * Snake: Couldn't be much worse than Ocelot's old torture device...
 * Mei Ling: Oh, and, Snake?
 * Snake: What?
 * Mei Ling: I was wondering, could you maybe try and catch Pikachu for me? Pleeeeease?
 * Snake: Give me a break! What do I look like, a Pokémon Trainer?
 * Mei Ling: (disappointed) Fine... Sorry I asked.

Role in the Subspace Emissary
Pikachu begins the game trapped within a strange device that harnesses his electrical energy to provide power to the complex. Samus, infiltrating the complex in search of her Power Suit, sees that the device causes Pikachu pain, and breaks it. In thanks, Pikachu helps Samus continue through the lab. Eventually, the pair come across Samus's Power Suit within a tank. After dispatching two clones of Samus, Pikachu helps Samus (in her newly regained Power Suit) through the rest of the facility and helps her defeat Ridley.

After escaping from the complex, Pikachu and Samus infiltrate the Subspace Bomb Factory and encounter the Ancient Minister. Despite Donkey Kong, Diddy Kong, Captain Falcon, and Captain Olimar coming in soon after, the Ancient Minister does not fight back, and tries to stop the other R.O.B.s from obeying Ganondorf. Ganondorf gets the R.O.B.s to set up multiple Subspace Bombs, and the Anceint Minister, with the R.O.B.s no longer under his control, reveals himself to be the head R.O.B. of the island and helps Pikachu and the others defeat the Subspace Army and escape the island in the Falcon Flyer before it is consumed by Subspace.

Pikachu and the rest of his team join the remaining heroes in their last stand against Subspace, only to be defeated by Tabuu. Fortunately, King Dedede had planned this in advance and created badges that revived fighters from being trophies. Using these, he is able to form a team conisting of himself, Luigi, and Ness. Dedede and his group then revived most of the others, including Pikachu, before everyone has rejoined and proceeded to face Tabuu in a final battle.

Profile Information from ''Super Smash Bros.
''Pikachu Mouse PKMN Height 1`04`` Weight  13lbs When several of these Pokémon gather, their electricity could cause lightning storms. (Pokédex excerpt)

Trivia

 * In Wario Land 3, Wario collects a treasure called Pokémon Pikachu.
 * One of his alternate outfits in Super Smash Bros. Brawl are a pair of goggles. These were worn by Pichu in Super Smash Bros. Melee.
 * In Super Smash Bros. Brawl, Pikachu wears a headband similar to Brendan's bandanna on Emerald as an alternate costume. Also the Pokémon Trainer has an alternate costume with a similar color scheme as Brendan's Emerald outfit.
 * In Super Smash Bros. Brawl, Pikachu is the unique character which has four alternate costumes.