Joined: Jul 2016
From what I've heard, A Certain Magical Index/Scientific Railgun is the closest thing to what you're looking for. Both are anime that view the same events from their respective MC's perspectives. (I haven't seen them, I'm just going off of what Gigguk and other fans of the series are saying)
Toaru (A Certain) is hardly counts as one as it's literally take placed in the same world and same setting with different MC (Also, Railgun is a spin-off not a main series).
Joined: Jan 2017
Isekai Quartet is the best crossover in the entire universe.
I'm surprised you didn't pick Carnival Phantasm
I have yet to watch it. But since I love Saber, I believe it should be a close second.
Joined: Oct 2008
Densetsu no Yuusha no densetsu
Itsuka tenma no Kuro Usagi
Kannazuki no Miko
Kyoushirou to towa no Sora
Yami to Boushi to Hon no Tabibito
Groove adventure Rave
And I can think of three more, but there should be more shared universes.
Joined: May 2018
Why you guys even bother to count them they are many?
Some from the top of my head:
Detective Conan and Kaitou Kid
Cat's Eye and City Hunter
Tenchi Muyo and GXP (and via parallel worlds El Hazard, Dual Parallel ect. ect.)
Outlaw Star and Angel Links
Lodoss-tou Senki and Legend of Crystania
Soukou Kihei Votoms and Kikou Ryohei Mellowlink
Yatterman and Time Boken
Working!! and www.Working!!
Zettai Karen Children and The Unlimited - Hyoubu Kyousuke
GaoGaiGar and Betterman
Yojouhan Shinwa Taikei and Yoru wa Mijikashi Arukeyo Otome
Many crossovers - those between Shounen Jump shows are the most popular (for example Gintama vs On Piece).
Lupin III had many crossovers in it's second season but maybe my favourite are crossover movies with Detective Conan.
Speaking of DC it had a trible cross over Kenyuu Densetsu Yaiba and Kitou Kid OVA.
Judging by the trailer the latest City Hunter movie is crossover with Cat's Eye
Modified by alshu, Apr 30, 4:23 PM