Fox's best attribute is his speed.  He's the second fastest character in Smash, second only to Captain Falcon.  He is light wieght so his recovery time is very good, and he can do hit and run attacks well. The Fire Burst attack will go directly through projectiles, and it's also a good follow up to a "UP+A" kick in the air.  Try to use the air kicks as much as possible but keep low to the ground, or you'll be sucseptible to upward smash attacks.

B  =  fire laser.  

B+up= Fire Burst.

B+down= Pulse shield. (this shield will also bounce back any thrown object including turtle shells.  It will double the damage too.)

A= punch/kick/fast kicks.

A+up= High kick  A+up quickly= Back flip kick

A+down= Tail swipe  A+down quickly= Split kick

A+over= quick attack  A+over quickly= roll kick

A+running= flying kick

AIR

A: ninja kick

A+forward: spin kick

A+back: back kick

A+down: winding kick

A+up: flip kick