I just recently finished watching this anime called Ebiten and almost fell off my chair laughing when I spotted characters from a totally different anime! Although making a parody from the popular series - if we think the Nabehameha from Excel Saga with it's DBZ reference or possibly dressing in cosplay making them similar to characters from a such series isn't really something uncommon as long it's a part of the japanese culture, but no! What now I mean are cameo appreances of characters outside of their own series. If I take my own experience I can remember a few other cases as well.
Well let's see.
1. Natsu no Arashi - sometimes you can see in the background the 4 main girls from Hidamari Sketch as guests in the
cafe. Also some girls from Saki, though those are slighly recolored.
2. Hanasaku Iroha - in the school festival one of the billboards displays Hiromi from True Tears also a random girl
wearing the True Tears school uniform walks by.
3. Ebiten - During the school festival, Ikaros and Astraea from Sora no Otoshimono help out with the preparations and
you can spot the two main girls from Seitokai no Ichizon talking in the hallway.
4. Super Sonico the Animation - Multiple posters with Hatsune Miku, though this isn't surprising as long the series
was sponsored by anime figure companies like FREEing and Goodsmile.
5. Baka To Test to Shokanju - Hatsune Miku seems to be a student in class B.
6. Asobi no Iku yo! - Natsuru and Shizuku from Kämpfer are standing inside the crowd when the spaceship appears.
7. To Aru Kagaku no Railgun - Shana and Yoshida from Shakugan no Shana stand in line by the crépe stand
8. Ookami-san - Toradora and Railgun characters appear when the main characters search for a fitting candidate.
9. Kannagi Crazy Shrine Maidens - Jin accidentally enters the wrong karaoke room where the 4 main girls from Lucky Star
are present.
10. The World God Only Knows - Takao from D-Frag is a character in a gal-game of Kenma.
11. Binbougami ga! - When Sakura opens the closet, Doraemon is inside.
12. Cromartie Highschool - Dejiko from Di Gi Charat appears when Akira Maeda tries to learn properly wear a
nekomimi.
If we look in those more deep, we can notice that the appreances aren't really that random as long the series where done by the very same studios. Is just for fun or they try to advertise? Hell knows.
If anybody can make this list longer, is more then welcome!
Ikaros in Ebiten? Yeah!
You think this is the Kämpfer anime? Hell no.
