Pikachu is a fictional species in the Pokémon franchise created by Nintendo, Game Freak, and Creatures. It is an Electric-type Pokémon known for its yellow fur, long ears, and iconic lightning bolt-shaped tail. Pikachu serves as the franchise's mascot and is most famously associated with the character Ash Ketchum in the Pokémon anime series. Its popularity has made it a cultural icon worldwide.
Pikachu can be rarely encountered in Viridian Forest or in the Power Plant. It'll take some time to find it.
A shiny pokemon cant be found at a specific spot. They have the same rarity everywhere. Its kind of like magikarp in gen 3. Magikarp appears in water but appears everywhere