Who has time to deal with all of that?
A million Pikachus, of course. Where would you keep all of those Poké Balls? What if they were fussy like Ash's Pika and didn't like to be confined to a Poké Ball? Adult Pokémon Pikachu Slipper | Pokémon Gifts When too many Pikachus assemble, they can create thunderstorms in the general area.