Pikachu is by and large the most recognizable character from the Pokemon franchise, which began its existence on the Game Boy on February 27, 1996. The purpose of the game was pretty straight forward. First, the player must catch and train as many different species of Pokemon they could from around the Kanto region. The second objective was to defeat the leaders of 8 gyms, each of which were specialized in a certain Pokemon type. Finally, after acquiring all 8 gym badges, you could enter the Pokemon League and battle the Elite Four. From time to time, you occasionally run into your town rival who challenges you to a battle.
The game extended beyond its single player mode, and introduced a trading system where players could link up their Game Boys and make offers on each other's Pokemon collection. In fact, trading was the only way players could catch all 151 original Pokemon species.
The success of the original Pokemon games spawned of creation of hit television show, 10 feature films, a card game, and 3 later generations of Pokemon games. Each subsequent generation introduced a new set of creatures, bringing the current total to 493 different species of Pokemon.
Although Pikachu made his debut on the Game Boy, he didn't become a worldwide hit until the television series first aired in Japan on April 1, 1997. The show follows the journey of Ash Ketchum as he trains to become a Pokemon master. His first Pokemon is a Pikachu, given to him after the all other starter Pokemon were given away to other trainers. Although Ash and Pikachu's relationship starts of poorly, they soon develop a strong friendship that continues through the entirety of the series.
Pikachus are mouse Pokemon that specialize in electric attacks. They evolve from Pichus and later evolve into Raichus with the help of a Thunder Stone. Though Pichu wasn't introduced into the franchise until the second generation, it still makes an appearance as playable character in Super Smash Bros. Melee.
Pikachu gets his Final Smash from Pokemon Emerald. Volt Tackle is a powerful electric attack that causes damage to the Pikachu due to recoil. It is obtained by equipping any member from the Pikachu family with a Light Ball and breeding it with another Pikachu-related Pokemon. If everything goes as planned, a Pichu will be born with Volt Tackle in its moveset.
Like its Game Boy counterpart, Volt Tackle in Brawl is a very powerful attack that turns Pikachu into a giant ball of electricity. The player gets the freedom to control the direction of Pikachu's attack. However, similar to Volt Tackle on the Game Boy, such a powerful attack comes with a price. Instead of being hit by recoil, if Pikachu is not positioned carefully when the attack ends, he runs the risk of falling to his doom.