(wrote a review as an apology for failing to understand basic linking)
Loving the intro! It starts off with a really strong "SETTLE IT IN SMASH" (ssb ftw), immediately establishing a sense of fervent energy in the listener. It quickly transitions into an awesome, fast beat, which was pretty well mixed (as the guys said below), even with all the reverb in the percussion. Still, it felt like it was missing some high mids. The bells were really treble, but the only high mids you really had were a really transient trance-y synth and some strings. With the sweet beat and the high bells, it felt like there was a giant gap where a cool high mid sound could've gone.
The trumpet melody at 0:44 was great! It was adventurous and exciting. Did you come up with it yourself? Because it sounds kind of familiar. It’s reminiscent of every heroic game ever, which means that if you made it yourself, you have a pretty awesome sense of melody. :) In fact, all of your melodies here are really energetic and feel like they could’ve come straight out of a video game.
While your composition was really good (emphasis on the beat and the melodies), there were certain aspects that bothered me a bit. That filter effect you had at 5:07 can be a pretty effective way to transition to different parts, but here, it felt a bit deliberate. I don’t really think you needed to have a filter, and the way you implemented it was pretty sudden. Also, you had a fadeout ending. Now, if you continue doing music-related stuff (especially on Newgrounds), you’ll find that people are in two minds about fadeout endings, and arguments can get pretty heated. Personally, I find fadeouts acceptable in only two scenarios: OSTs and songs with stories. But hey, if you enjoy them, go ahead. I just think they don’t push musicians to their creative potential.
Your production was pretty nice! The mixing was excellent, except for a few parts when the bass-y synth was really drowned out by all the bass-y strings and everything else going on (noticed especially at 1:24 and 3:49). What I like about your mixing is that in parts, you portray a sense of emptiness, and in other parts, a sense of energetic density. The fact that your mix goes through so many different emotions says that it’s pretty good.
Your stereo imaging, on the other hand, was a bit off. It felt like nearly all the orchestral instruments were in my right ear, while there wasn’t anything very prominent in the left. It probably wouldn’t be a problem when played over speakers or by a console, but while listening to it with earphones, the panning is a bit disconcerting. :(
TL;DR:
Overall, I really liked your song! It was adventurous, heroic, and definitely fits the vibe of a Super Smash Bros game. Your instruments, while low in quality (which I know people can’t help if they don’t want to empty their wallets for good VSTs), went great together, and I especially loved your mixing, beat, and melodies. There were a few issues, but I hope you continue to make awesome music like this. Great work!