This doujinshi features a crossover between the girls from Magic Knight Rayearth and Domon Kasshu, from G-Gundam.

And there's also what I think is a crossover between characters from some game and Shazzan, the genius from the old Hanna-Barbera cartoon (http://en.wikipedia.org/wiki/Shazzan). Shazzan is the guy in page 44. The crossover starts at page 101.

The circle seems to like the character, as a google search brings a reference to a doujinshi called SHAZZAN THE MAGICAL MASTER, that should be available in Japanese p2p networks (http://www.nyhash.info/index.php/1e4edc80a28e04137672024efa91b6f3/). He also appears in volume 8, that I uploaded before (https://e-hentai.org/g/343315/057e580816/) and in another volume that I will upload soon.

Page86: is Morrigan pulling a Nyancat in the last panel?

Base +10, ☆Loli Police☆ +14

https://www.doujinshi.org/book/1768892/R-KIDS!-Vol.-10/

Base +11, Gabygabycandid +6