JPEGs of Tetsuhiko Kikuchis self-published book about the game YukeYuke! Trouble Makers (AKA Mischief Makers) which he worked on as a Character Designer. Originally from here https://archive.org/details/troubleshooting_202002
Oh yeah, I forgot to upload this here. I have the original HQ scans, and the scanner said he would translate it for me to typeset. That was a while ago, however, and I haven't heard from him... I'll ask for an update, but if any other Mischief Makers fans out there want to translate instead, lemme know. I also have a few more Treasure artbooks to scan. Here are the soundtrack CDs that were ripped, too.