Righto, thanks.
How would one SHDL? Claw method? Y and B? Control stick up and B? How does M2K do it? o.O
Pretty much none of what they said looked helpful to me in terms of SHDL
The way I found out to do it was rolling my thumb from X > B.
What I mean is NOT lifting your thumb off the controller at all. Keep it on the plasticzz at all times.
Now short hop with the slightest slide from X > B. just slide it quick from X > B and press B twice. You should have a ton of time. Oh, and try not to hit A, although it prolly wont happen too often, just be gentle.
TBQH I found sliding from X > A was good for shffl's too, but you can get away with lifting your thumb off the controller for those.
If this was at all unclear, which it most likely was just IM me or post here again.
As for the rest of your Fox game...
Basic combos:
Up throw > Up smash.
Up throw > U-air > and repeat
Dash A > U tilt > U-air
U-air > U-air and repeat
Fox's B-air is also wicked and his N-air has A TON of Priority.
Most of your advances should be with a shffl'd N-air > Shine. At higher percentages you wont need to shine as they'll be sent too far from the knock back.
Fox's kill moves are usually Up Smash or U-tilt but B-air is also good as is F smash. Shine spike as necessary.
Learn to wave shine (easier said then done).
Personally I also love down tilt > air combo of your choice.