Okay, I'm the only one who watches Mar: Marchen Awakens Romance here, but you might find this interesting:
One of the characters, Nanashi, is really a character (Joker) from another manga (Flame of Recca) created by the same author. (Nobuyuki Anzai)
Proof:
*Nanashi isn't from the world of Mar Heaven (the world in the Mar: Marchen Awakens Romance) proved by various cirumstances.
*When he was first found he had a wound on his stomach nad was wearing Joker's bracelet. When Joker was last seen he was cut in the stomach and created a black hole that sucked in both him and the person who cut him.
*He has no memories of himself before he came to Mar Heaven, and one time, a little after his introduction, he remembered of shadowy image Joker and mentioned something about always about to remember something but never succeeding.
It's called a CROSSOVER.
There are times, especially in the marvel or DC universes where characters will intermingle, there were even a few incidents where characters from marvel appeared in a DC comic. Or was it the other way around? :-\
Yeah, I think that if a company pays enough in royalties, they can use another show's character in their show.
It was the same author, so I don't think that they paid money. He can use all of his charatcers in every manga he makes as much as he likes.
Well if it's the same author, he can do whatever he wants. It's like Namco putting Yoshimitsu and Heihachi in Soul Calibur.
I don't watch the show, but Im actually somewhat interested in this, top it off, I don't think I've heard of this show.
I want to say this first: When I first saw your avy and sig, I thought you were a new member, Wolf Link!
Yeah, this is weird. Although it has never been stated that he's Joker, all clues lead to this.