The quest for info! I like to dig up background on these groups, because it's interesting and fun. Though it's also sometimes quiet a chore if the group isn't well known. Over the last few days I've spent some time listening to Pinkish and trying to find out more about them. I first tried looking for videos on YT, and turned up with around 5 to 6!The next step would be using search sites (I'm such a Google gal), but the problem is that with a name like Pinkish -lacking kanji or even romaji- I got a lot of results about things pinkish colored, makeup, etc. Totally unrelated to the Japanese idol unit. So then I used my thinking cap, and googled for 'google.jp' ~ since whenever you see that little 'jp' in a URL you know it's a Japanese site.
And TADA, I clicked on the link it turned up and from there I again searched Pinkish. The websites results were a little confusing for me, so I switched to images and was quite successful! Especially on one blog in particular; www.ecity.ne.jp ~ I'm not exactly sure who writes it, though I think it covers going-ons in the Saitama Prefecture.
The blog is linked to the YT account Saijiman; which is pretty much the only place I could find Pinkish's videos. Here are all of the entries under the label Pinkisshu. There are a lot of good pictures of the girls at different events, mainly from 2009. At the TIF only three girls performed, thus I first thought it a trio unit. But after finding their ja.wikipedia page, I learned differently.




