Thanks.
Not that I am doubting you, at all, but let's see: Chrono from Chrono Trigger; though there is the related Chrono Cross series if it is related at all, Chrono is still an old character, possibly older than Geno himself. I also can't imagine anyone from Chrono Cross getting in Smash. The characters from Balan Wonderworld (Yeah, I know) are pretty much not showing up, and Lara Croft and Gex from the western side of Square Enix have been sold off, and this is not even counting the Enix side of the company.
I can only see a few characters be competition on the Square Enix side, such as Black Mage (even though Final Fantasy has reps already) and a Taito character, which is owned by Square. I am aware that I could be missing others.
On the Mario side, while he has competition in that regard, I can see that there are not too many Mario characters aside from Yoshi, Donkey Kong and Wario that Geno has to compete with. Kamek would be a Yoshi character in my opinion, and King Boo...I am not sure about them. I do see Toad as a possibility, kind of, but honestly, I do not think he is getting in the next Smash unless something proves me wrong there. I think the main competitors are Pauline and Waluigi. Those aren't the only ones Geno has competition with, but to me, it is a smaller pool of characters to deal with, making Geno's chances somewhat better, and he could get in along with one of them.
But yeah, feel free to tell me if I missed anything.