You're making a stupid comparison in the first place. Geno fans were fucking nuts. Nothing is comparable to them. We're talking about a massive fanbase that wrote petitions for a third party character from a single 1996 SNES game.I'd go Geno, Ridley, Krystal.
Geno versus Ridley is a close one but I give the nod to Geno because fans of him are almost entirely 100% serious (and crazy but that's not relevant here) while a ton of people who "support" Ridley on this board I can guarantee are not serious and just want to see the world burn, possibly grabbed and slammed against the wall.
Krystal Fans are crazy like Geno fans but far less numerous because she's only in shitty Star Fox games. Plus they gave up far sooner.