I'm not going to hold your hand here, because that's the only way you can learn. GoAnimate is basically Newgrounds' equivalent to those horrible Xtranormal videos that died off in 2009 or so.
But this is bad even by GoAnimate standards. This isn't even Xtranormal bad, more complex animation could have been made in Windows Movie Maker. Hell, even Powerpoint.
Nothing is animated, save for the (probably pre-made) explosion, Megaman's spawn (which is too slow and looks more like a sped up slideshow), and 2 second tween here and there (which could be done in flash in about 3-4 mouse clicks.) Your sprites are blurry, because this isn't a .swf file. Your backgrounds are nonexistent- just a white background and an orange gradient.
It's hard to even offer constructive criticism because in doing so, that requires more effort than what you put into this, so bear with me here:
First off, ANIMATE IT! You might be able to impress elementary school students by dragging still images across the screen, but considering that can be done by anyone with even the most basic knowledge of flash; it's not going to get you anywhere here.
Add voices, lip-syncing, use the style of old movies such as Nosferatu where the text is displayed on another screen after they're animated to look like they're talking, use Microsoft Sam's voice (terrible but still better than silence); Christ, ANYTHING! What you've done here is used the text tool and wrote dialogue above the speaking character's head. Not even a speech bubble. Not even an animation of their still sprite rocking back and forth to show that they're the ones speaking. Not even a half-assed clock-styled triangle above their head as they speak.
Furthermore, often characters spoke at the same time as each other. It's just pure laziness to not even have the patience to extend their dialogue a bit and let each character have their time to talk; rather than making your audience pause the video just to know what the hell is going on.
Stop using GoAnimate. I promise you, Flash is just as simple for something of this quality; don't get me wrong, I am NOT encouraging you to keep making animations of this quality- But you've gotta start somewhere, right? Thing is, you'll at least improve with Flash. GoAnimate will always be rubbish on the other hand.
Zero stars. Anyone could replicate this in a half an hour, and that's if they took their time.
Hope you take this to heart and don't disregard criticism, if you're unable to admit that your work sucks, you'll never improve. But hey, gotta start somewhere, and you're lucky this even passed judgement.