Updated with 3DS Default Control Scheme. Anyone like?
It's not a requirement that all buttons be used.
It's often more easier to have as little movement of the hands as possible.
The game only requires:
- A normal attack button (A button)
- A special attack button (B Button)
- A button to dodge and block (L button)
- Possibly a button to grab, but this was also normal+special on the Wii Remote + Nunchuk setup, which I found easier.(R Button [its closer to the z button, like the gamecube])
- Movement (Circle pad, duh)
- Taunt (d pad)
My edition
it'd be just like the gamecube controller, minus the c stick and z button