Pikachu is a fictional creature that belongs to the Pokémon universe, and your name means "sound of an electric mouse", in free translation from Japanese.
To understand the meaning of the name Pikachu, first it is necessary to understand the different use of onomatopoeias in the Japanese language.
Pika represents the sound made by electric shocks, While chu means the rat noise, according to the Japanese language onomatopoeia.
So, basically, Pikachu consists of the junction of two onomatopoeias that represent the sounds made by an electrical discharge and by a mouse.
Remembering that in Pokémon - franchise created by Satoshi Tajiri - the Pikachu is just a kind of electric mouse, capable of emitting intense electrical discharges on his opponents when he feels threatened.
See also: the meaning of Onomatopoeia.
Pikachu Evolutions
In the fictional world of Pokémon, Pikachu is the evolution of pichu, a kind of electric mouse, and the previous form of the Raichu, which is considered the last step in the evolutionary process of this Pokémon.
In all stages of Pikachu's evolution, however, this Pokémon retains the particularity of storing and emitting electrical charges from its body.
Learn more about meaning of pokemon.
