Canon • 
Dubiously Canon
In Paradox Space[]
Con Faire[]
Caliborn competes in the Teen Con Air Finals on a team with Vriska Serket, Lil Seb, and Lil Cal. They initially win for the most accurate portrayal, but their prize is instead awarded to the team composed of John Egbert, Roxy Lalonde, and Casey.
Cherub Charitable[]
Caliborn receives a gift from Calliope. It is a book titled "Brother's Fan Art Book" and is made of his drawings. Calliope left a note for him next to their chessboard stating that she is “ready to play again whenever [he] is”.
On Snapchat[]
Caliborn participates in Halloween by jacking Jake English's swagger, with Gamzee Makara in turn dressing as Caliborn.
In The Homestuck Epilogues[]
An older John, having returned to the events of Homestuck from Earth C, recruits seven teenage iterations of his friends
to confront Caliborn. Initially finding themselves in a dark void,
Jade locates Caliborn underneath a gray spotlight, dancing with Lil Cal, Gamzee and Lil Seb naturally also present.
After some initial confusion, Caliborn recognizes John, and begins to ramble about the claymation reenactment of the very fight that's about to take place. Much time appears to have passed since Caliborn's appearance in Act 7, as he refers to the claymation as “THE MASTERPIECE I MADE. WHEN I WAS BUT A BOY.” He brags about it at length, laughing the whole time, as his jaw unhinges and his voice distorts. John and the others soon engage in a fight with Caliborn, which the narration seems to indicate was much less one-sided than the initial claymation implied. Eventually overwhelmed by the fight, Caliborn unleashes the ultimate weapon on the four beta kids. They all get sucked into it almost instantaneously, and Caliborn laughs at them as he returns the Juju to the chest and closes it.
