Not a request at all, but here's what Geno could make a major appearance in Super Smash Bros. Emerald (and Worlds Collide), instead of a random troll character like the Excitebiker. He's an unlockable fighter, and all of his moves from Super Mario RPG appear as specials. Geno has special team-up names for Mario, Peach, Bowser and Rosalina as well, as a nod to his debut where they were all part of the party for the former four and Rosalina's ties to the cosmos.
Geno's stage is Bowser's Keep, the first stage in Smash to take place in one of Bowser's castles. This stage is rather simple. You start off fighting on top of the chandeliers just like the Bowser fight from Super Mario RPG, with black space surrounding it. The chandeliers are held up by a chain known as a Kinklink. Both chandeliers one Kinklink attached to them. By attacking a Kinklink, it will eventually break off. Once you have defeated a Kinklink from either one of the chandeliers, the chandelier will fall for a great distance, referencing the scene where Mario and Bowser fall for a considerable amount of time in the original game after defeating Bowser in a boss fight. Eventually, you will arrive at a random section of the Keep, with each section being different in layout and design. Plenty of cameos make appearances as well, such as Mallow, Frogfucius, Booster, Croco, Jonathan Jones, and various enemies from Super Mario RPG.
After a while, the Chandelier will repair itself after a little while and it will rise all the way up to the top of the Keep again, reconnecting itself with the Kinklink.
What do you think? The overall reason why Geno could be playable in the final release of Super Smash Emerald (and Worlds Collide) is because I think the Excitebiker "did not have the proper requirements to fight". Credit to Sean Hicks for the Geno render.