A map of stores can be seen on Pokemon.com's locator, though TPCi no longer publishes the full list as they did in previous years
Akihabara, Ikebukuro, Nakano, Shibuya & Shinjuku (Tokyo), Osaka, Kyoto, Nagoya, Himeji, Yokohama, Shizuoka, Fukuoka, Sapporo, Sendai, Hiroshima, Kobe, Kagawa, Kanazawa, Okinawa, Aomori, Okayama - 20 cities and districts across Japan
But then you think how funny it would have been to laugh then, and you almost laugh a much bigger laugh, and then you hold it in, and this repeats until you have this giant laugh you cant hold in thats significantly worse than the first one, thereby completing the Giggle Loop.) So, having just essentially Giggle Looped on my Dentists chair in the middle of dental work was, to say the least, something I still find funny
that is, there arent many basics you can get stuck with, so the lands are a bit more dense than usual