In fact I just got inspired, here's the idea:
I'll mostly use Kamen Rider moves and their names for simplicity.
Mach Rider
B=Blaster, Kamen Rider is a good reference. Shoots the enemy with a beam, similar to Falco's in speed and delay, but it's more "explosiony"
>/<+B=Rider Chop, it's got a very "slashy" animation
http://kamenrider.wikia.com/wiki/Rider_Chop
^+B=Rider Kick
http://kamenrider.wikia.com/wiki/Rider_Kick
We got plenty of variations to work with, like the Sky Kick for example, especailly since it's ^+B, it's gotta be a recovery move somehow.
v+B=Mach Bike, Mach Rider mounts his Mach Bike.
Other than that, all his Neutrals and Aerials and the like are taken from Kamen Rider as reference, just like C.Falcon, but with obviously, different moves.
FS= Rider Shooting
http://kamenrider.wikia.com/wiki/Rider_Shooting
On the Mach Bike:
Mach Rider can't jump, nor do Grabs and Neutral Attacks, he can only move and do Specials, if hit too hard, he gets knocked off. Jumping and v+B dismount the bike. By "can't jump," what I mean is he can't jump with the bike, he can jump off the bike like Wario can.
B=Blasters (from the Bike), he shoots forward with the blasters on his bike, obviously a superior version of his regular Blaster.
>/<+B= Wheelie, Mach Rider does a wheelie on his Mach Bike that hits the enemy, the effect of this move is essentially like a Bull Charge. Both the upward strike and the "falling" hurt the enemy, the downward motion being more like a "crush." More effective while in motion, and it speeds up his "running speed" when doing so.
^+B= Missiles, he fires missiles upward (at a 60* angle) from his Bike.
v+B= Dismount Bike.
Thoughts? I'm thinking of making a support thread for him if there isn't one and posting a whole complete movepool like I did for Lyn. I'm starting to really like this character.