Fourth Wall Awareness and Prior Knowledge

I'm just getting a discussion going on the effectiveness of Fourth Wall Awareness / In universe knowledge of other fictional universes, and whether or not this is knowledge that does not fall under "prior knowledge"/

For example, Kumagawa, has knowledge of several other jump shonen manga universes (ignore the red box, it's an image from a different thread) and references them, while Harry Dresden from the Dresdenverse has knowledge of Star Wars, Star Trek, Spiderman, and Harry Potter among other fictional verses. If a battle was to be done between characters where one already has canonical knowledge, would we still say "no prior knowledge" and take that knowledge away from them?

I personally believe that if the knowledge they have is canon, they should be allowed to keep it, but I am starting this discussion to see the thoughts of other people.

If they explicitly know things about another series, it should probably count, yes.

This should come in handy for characters like bugs and mxy.I think i agree with opinion.

Necro