025 Pikachu

Pikachu (Japanese: ピカチュウ Pikachu) is an Electric-type Pokémon introduced in Generation I.
It evolves from Pichu when leveled up with high happiness, and evolves into Raichu when exposed to a Thunderstone.
Pikachu is popularly known as the mascot of the Pokémon franchise and a major representative of Nintendo's collective mascots.
It is the version mascot of Pokémon Yellow, where it is the only starter Pokémon in that game, and has made numerous appearances on the boxes of spin-off titles.

A Pikachu is a short, chubby, ground-dwelling rodent notable for its Electric abilities. Pikachu have short, yellow fur with brown stripes on the back, red cheeks that can produce small jolts of electricity, a mouth that looks like a sideways three, black-tipped ears, along with an unusually shaped tail, resembling a lightning bolt. Besides its evolution and pre-evolution, it may be related to Plusle, Minun, Pachirisu, and Emolga due to notable physical similarities.
Pikachu are known to have acute senses of hearing, thanks to their large ears. Most domestic Pikachu are able to understand and interpret human speech at levels far surpassing those of any pet dog.
In Pika and Goliath!, when Ash's Pikachu was injured, it was shown to have a heart rate of 156.