When you live in Japan, you have to accept some things: crowded trains, lots of tourists gawking, and the occasional invasion of a thousand Pikachus in a park.
For clarification, this was part of Pikachu Outbreak! - a Pokemon event in Red Brick Park...or a stealth invasion by enormous Pokemon? You be the judge.
<iframe width="640" height="360" src="//www.youtube.com/embed/U9VkRwpFvwU?rel=0" frameborder="0" allowfullscreen></iframe>