I've been imagining Xander Mobus voicing him lately. My idea used to be Kirbopher before, well... stuff happened there. (The thought of him alone makes me shudder lol.) That said, Xander's Joker voice, maybe with a biiiiit of a higher pitch, really fits Geno imo. He has the intensity and coolness, as well as the feather light tone and inflection that I always imagined he had.
Besides, narrator Xander saying Joker's and Geno's names as the two go head-to-head? Beautiful scenario.
Also, they both have guns. Geno's neutral special being Geno Beam? Basically...
GUN. To top it all off, with the card suite theme-age in SMRPG, everyone has a normal suite (hearts, spades, clubs, diamonds) except for Geno, who has a star a.k.a a wild card a.k.a
a joker.
What I'm saying is Geno is a Phantom Thief, thank you for coming to my TED Talk. (I even drew that one image of an All-out Attack Geno that blew up before rofl. Perfect.)
Source on that last claim, btw? I've never heard anything of the sort. That'd be... such a weird fit for Geno imo.