* Pokemon don't exist in the real world: Pokemon are fictional creatures from a video game and anime series. They don't actually exist, so you can't catch one in a PC box.
* PC boxes are for storing data: The "PC box" you're likely thinking of is the physical case that holds your computer's components. It's designed to protect and house hardware, not living creatures.
If we were to pretend for a moment, here's what might happen:
* Your computer would probably be very unhappy: Pokemon are magical creatures. Putting one inside a PC box could disrupt the delicate electrical circuits and probably fry some components.
* You might get electrocuted: If a Pokemon somehow generated electricity, you could get a nasty shock trying to put it in your PC box.
* The Pokemon would likely escape: A Pokemon would be way too big to fit in a PC box, and it would probably use its powers to escape anyway.
The Bottom Line:
It's a fun thought experiment, but catching a Pokemon in your PC box is just not possible in the real world! You'll have to stick to catching them in the digital world of Pokemon games.