weRd, I use X and R.
x is the one on the side right?
as a suggestion to incorperating wave dash into your game, I'd suggest going into training mode, and standing 'bout 6feet away from some one, then WD'ing to them and attacking them as fast as possible after the WD. Try this w/ all of doc's smashes, arials, & tilts, over & over. Until you can get each one to be liquid-cool packing the power of the sun to smash your enemies away :D (Capri Suns are tastey ^_^)
Next, I suggest you start trying some of them ledge tricks, like when you're holding onto a ledge, you tap down & then immedialy jump, and then WD back onto the stage (it looks rather sexy) and doing that into what I mentioned above, an immediate post-WD attack!
Also, try WD'ing to grabs, I suspect gettin' good at this will improve your game play drastically!
oh, & along w/ WD'ing try wavedash-dancing where it's like, omgosh I don't even know what it's like but you dash one way, and then wd back, a nd then dash the other way, a nd then wd back and repeat! iunno, but it look'd sexy in smash mac's tutorial vid.
hope i waz helpful ^_^