There are 4 Pokemon Center(s) in Tokyo!
- Tokyo Eki Pokemon Center: in Tokyo station, floor 1S, a small one
- Pokemon Cafe: in the same floor of Pokemon Cafe, very big and several stuff on sale. They gave me stickers for free because I did not know about Pokemon Cafe reservation, such helpful staff.
- Mega Pokemon Center: the biggest in Tokyo -and maybe, in the world- where you can find all sort of Pokemon stuff
- SKYTREE Pokemon Center, in Skytree 5th floor, a bit tricky to find but a nice place if you are around
Another one is in Tokyo bay (Chiba Prefecture) and in the biggest japanese cities. Since I went to Fukuoka, I visited Hakata Pokemon Center.
If you like Pokemon, a visit is always worthy because of periodic distributions of Pokemon and items in Pokemon games.