Dash Attack is very shaky towards the end. Other than that, I don't see anything wrong with it, other than it possibly being a tad stiff.
Side Special is very jank and stiff.
Up Air and Up Throw seem fine (moreso Up Throw). Good job on those two.
Up Special is kinda shaky towards the end, but not as much as Dash Attack.
Since you're re-creating Sm4sh animations, get yourself Ohana 3DS Rebirth, and the Smash 3DS files, so you can look at the animations Frame by Frame.
Or you can try your hand at porting the animations onto Link's Brawl skeleton.
http://forums.kc-mm.com/index.php?topic=75576.0We saw that after we remade almost all of his animations... Wouldn't re-rigging him to a Brawl skeleton means that we'd have to redo all his animations again?
To make things easier, set up a Brawl skeleton in BrawlBox, export and import into 3DS Max, position the bones, so they're in the same spot as the original bones (make sure they have different names before importing). Export the skinning of the original model, collapse the stack, delete the old bones, rename the new bones to what the old bone names were, then re-apply the Skin modifier, and Load the exported skinning.