True anime crossover

[Star_Of_Hope]

Is there any anime like that?
I wouldn't want to know about gag anime like gintama.
I don't think such an anime exists

 

[Kaname]

No anime got anything like it. This is not a drama or some power rangers series we are talking about. Lol.

 

[Blackangel]

there aren't any anime that i know of. there are some cross overs like in saiki kusuo for gintama but it's not official and just for a few laughs