Not going to lie, all of your animations needs some work. In many places it looks jerky and jumpy. Some places need to me smoothed out and perhaps a little bounce needs to be added. In animation its essential to show the weight of what your animating. have you ever noticed how a large dragon lumbers around slowly, yet a spider skitters about? The difference is in the weight.
The Timberwolf for example looks like its moving its heavy head up and down with unusual ease and speed, where in reality there would be at LEAST a tiny bit of drag and bounce.
As for rainbow dash playing the guitar... that arm....
The hornet looks nice, I see the legs moving up and down there, were you trying to make it look like they were bouncing when the hornet moves up and down? As they are now they appear to be just pointlessly moving around. The wings have a basic flap to them, although it would produce a much nicer result if you were to tilt the wings as well, rather than just having them wag back and forth. The wings now would produce no lift whatsoever for the hornet.
Here you can see theres much more going on than a simple wag.