Well, that's the point. You have to make it believable, and he did...If he were to say Sora was in, nobody would believe it.
Believable? I really don't think it's believable at all. His descriptions are so vague, unenthusiastic, and unlikely. Wouldn't he talk more about Ridley himself than how many pictures he's in? Like possible attacks, size, color? Anything other than he's Meta-Ridley.
And he says that the picture people were speculating on is confirmed to be Ashley's Manor. Why would the magazine link those two? It's fairly obvious he just was hoping so, and therefore used the opportunity to claim that the still from the video is in fact what he hopes it will be.
And then Serebii Joe actually telling him all of this, its just ridiculous. In all my days of having had him added (including within the past couple of hours), he's never been online. I've never talked to him, so he wouldn't know my SN to block it. And in his posts on the N-Europe board, he says he's been getting hundreds of emails from people wanting the information he knows, and he specifically says he's not telling anyone anything, in part because he's not supposed to know it anyways.
All this guy did was make it slightly-not-completely-ridiculous. He seems more focused on being right and having the last laugh than the information he's actually giving us. He just wants attention and to be liked, if only for a few hours until we have the real info.