What is Pikachu's National PokéDex Number?

Pikachu's National Pokédex number is #025 because it was assigned based on the order in which Pokemon were initially introduced in the games. Each Pokemon species is given a unique number that represents its position in the National Pokédex. Pikachu, being one of the original 151 Pokemon from the first generation, was allotted the number 25. This numbering system helps fans and players easily identify and reference specific Pokemon throughout the franchise's various media and games.