Seriously though, after playing some ARMS, I'm trying to imagine some of the moves that could be transitioned into Smash, most likely for Spring Man, who'd use a wide variety of Arms for special moves and Smashes. I could see him borrowing throws from other characters. I'm thinking his playstyle should be a really patient one, and kind of Dhalsim like with all the long range normals.
Jab could be the short range punches that the player does before a fight actually starts, while F-Tilt is the stretching punch, and can be done twice in a row. Maybe the Dragon head is a Side-B, the Wrecking Ball one is a Forward Smash. He Slams both Arms down with Hammers for a Down Smash ect.
A think the Down-B should be that Shield Arm, where pressing it once send it out will do minor damage, pressing again will extend it further and do more damage depending on whether or not it interrupts an attack,(if it doesn't it'll do the same amount of damage, but with more knockback). It'd work more like Falco's reflector, but for physical moves, rather than a Sword Squad Counter.