Okay, we're clearly talking about two different things here. Back up a few replies.
A user said that Geno was Square Enix's most popular character.
I refuted that based on the fact that, well, no he is not. Final Fantasy has 20 or 30 ****ing sequels. Tomb Raider has three motion pictures. Dragon Quest is on number... what, 11? Kingdom Hearts stars goddamn Disney characters.
When I say "Smash echo chamber", I mean this very forum and the greater Smash community that is overwhelmingly aware of who Geno is, possibly (and probably) despite never actually playing his one and only game. He is popular among Smash fans. This is arguably due to pack mentality and bandwagoning, but whether it's "real" or not, he has a huge following within our community. Outside that community? No. Especially not when being compared to some of the most prominent videogame and multimedia franchises of all time. That was my point like four posts ago. And what you're saying is just fleshing out what the echo chamber is and why it's important to the possibility of Geno's appearance.