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>>7783
Alterdz has a great shotacon imageboard. It's in Spanish, but it's not required to understand it or even have an account to navigate and view the pictures.
Rule34 and Gelbooru have some shota if you're willing to weed through everything else and have certain characters/fandoms in mind to search for the tags. Unlike Rule34, on gelbooru, there is even a tag for "shota" that returns roughly 24000 pictures, and also tags for fetishes and physical characteristics so you can narrow your interests.
I've heard genkiforum is pretty good (I was a member, using a different "identity", before they rebooted it a few years ago), but they require registration for an account to see anything, so I haven't been there as I prefer total anonymity these days where I can.
Shotachan (as the name suggests) used to be an open imageboard, but it's been recently transformed into another registration-required forum.
Littleangelshentai is mostly loli, but has a healthy shota subsection. However, like the above, you can't view any images without having an account. All the threads just appear "empty".
Honestly, that's about it. Five-eight years ago, shota was all over the place. But as more and more countries started equating it with CP, more and more hosts no longer allow it. Almost all active /chan boards have dropped it — after the transformation of shotachan, this was literally THE LAST ONE LEFT.
There might be some more foreign-language sites that I don't know about. Maybe ask about it on one of the forums if you want to hazard making an account.
>Google is your friend
I tried that. Got almost all softcore stuff, ALL THE DEVIANTART, and lots of Hetalia screenshots.
Tried "shotacon", got ALL THE DEMOTIVATORS , lots of 3D stuff, and some image hosts.
Tried "ショタコン", and got mostly scans from doujins (and, hilariously, a couple from HunterXHunter) and softcore headshots of boys from various animes.
It's really hit or miss using google.