Am I the only one who thinks Mega Man would actually be a better 'base' for Geno than Mii Gunner? Because I can even see some specials being made a bit similar.
I don't care if he's a semi-clone or not, just that he... gets in, hahaha.
By the way, fun lore for those of you who love to live in pain like I do:
What if the in-character reason Geno hasn't been around is because of his duties? What if he simply cannot come back because of his ties to Star Road? What if, even when he has the chance, he worries that his friends won't even remember him because it's been so long... so he refuses? He doesn't want to go back down there unless they wish explicitly for him. He fears that he's just... forgettable in their eyes, no one important, especially since (Mallow aside) they meet so many new friends on so many new adventures.
Enjoy that pain right there.
ETA: Also, in terms of Erdrick and Sora, I vastly prefer Erdrick. I can't stand KH. That's just me, though, and nothing against KH/Sora fans.
I do believe a Geno character would take alot of elements from Megaman. However, the only reason I would say that Mii gunner is a better base is simply due to movement and the fact that the previous costume model was already built with that frame in mind. Megaman still has that somewhat choppy platformer feel with the way he runs. His lack of a standard punch kick combo really is unique to him and the series they were trying to pay homage too .
However, I can picture them adopting many of Megaman's moves over to the Mii gunner template to create Geno.
For example.
-Megman -
1. His air down A, where he launches his arms.
2.(Geno Whirl) His side B(The circular Saw move). Just make that bigger and change the skin of it to something that appears like light. Duplicate it a few times, adjust speed.
Pretty much sums up Geno Whirl
-Paulutena-
Geno Blast- Uses the same effect of that pillar of light move she does
-Cloud-
(Geno Boost) Change clouds limit charge to blue, maybe add some of those "UP" Arrows.
-Wii Fit Trainer-
I would probably use her charging ball of energy attack for Geno Blast. If manipulated correctly, and since Geno turns into a cannon I guess it could be used as an UP B move. I think Project M did something similar.
-Samus-
Id take her charging up A, and swap out that fire effect for Stars. Which I think Rosalina has?
Honestly out of all the moves and animations available in smash ultimate, it would be easy to make him feel like a unique character by frankensteining multiple aspects of characters together. Whether or not its worth giving him a unique play style to pay homage to the series he originates from (timed mechanics) would be the question.