Has it ever happened (in a comic book, or TV show, or movie or anything) where Deadpool breaks the fourth wall and another character responds to it? Whether it's joining in and breaking the fourth wall with him, or being confused by his strange remarks and questioning him, or anything else?
There are multiple times to prove that some shenanigans were going on. Let's dig into some of the comics:
- And then there is this one. He says what the other characters are supposed to say.
- And I think this is one of the most obvious ones that can explain your question.
I think the characters around him would realise there is something weird going on, if he would just let them understand.
In the recent movie, there's a scene where Deadpool is talking to the audience and Colossus says "Who are you talking to? There's nobody around" to which Deadpool points at the camera and says "Them, over there!"
Ultimate Spider-Man-Season 2 Episode 15 Ultimate Deadpool - Funniest Scene
Deadpool breaks 4th wall, then spidey enteres his break and is confused, how that happened.
- Deadpools breaks 4th wall
- Spidey entered Deadpool's break and is confused how, and breaks Deadpools break.
And the other way round Spiderman sees Deadpool breaking the 4th wall, and is confused, because Deadpool is painting on his thoughts and Spiderman sees it.
2.1.: Spidey breaks 4th wall
2.2 - Deadpool enteres Spidey's break
2.3 - Spidey is confused by Deadpool's entering
- out of the same episode:
3.1 Spidey breaks 4th wall
3.2. Deadpools entered Spidey's break
3.3 Spidey interacts with Deadpools's break
Don't remember the issue, but one time there was a not-in-universe recap page that took the form of a talk show, and then in the actual in-universe comic later he references the recap page and the person with him at the time (who had also been on the recap page) is confused.