There's Ebay, though it can be hard to find single plushies, they usually come bundled together Link
Rakuten. Also usually just sets, but they're also a bit harder to find, I'd recommend just doing a general search for "pop'n music". Sometimes you can find a deal though, I got the Jack+Wilhelm+Black set for just $30. Link
Or the Japanese Amazon. You can find siingle plsuhies, and they genrally arent toooo expensive. Downside is you pretty much have to use a proxy, most only ship within Japan. (by proxy, like shopping proxies such as Noppin or From Japan ). That also means paying extra fees though :x Link
Information sure. Animations might be a minute cause I'm n the process of clearing out my computer.
As for the books, it's simply impossible to post all the pages because they're quite huge. However, if there's a particular character's page you wanna see or something else in the books (merchandise, beta designs, etc) feel free to specify and I'll post those ^^
I only have older stuff scanned atm so it was easier to just upload these then scan new stuff
(only characters right now, I'll get to the merchandise soonish I'm feeling p lazy lately) http://imgur.com/a/WjlTQ