Wow This one was a blast! I think the composition is amazing. I especially felt the transitions where super fluid. (1:11 was my favorite). In fact the only thing I have to say  is that id wish the song moved just a tad bit "brighter" in sections. The epic and triumphant parts where spot on, the "serious not so serious" bit I was less convinced of. It sounds like BW and BW2 opt to go in to variations of the original PKM theme at point in the song. 

If you arnt that hard stuck on being 1 to 1 then its already a bop IMO! 

It definitely gives me title screen vibes. Very cool. I would definitely say some adjustment of the mix would be beneficial in order to bring certain elements into focus a bit more.

The idea behind this is really cool! Not many people go for title screen music, but you did it really well! The style here is really on point, very accurate to how real games do it. My favorite part was the percussion, they were doing some crazy stuff that made the piece really intense and epic. I feel the melody could've been brought out more though, it's kind of lost in the background with the other instruments and could be more prominent in the mix. I also enjoyed the nice piano line at the end that brought down the energy for the song's conclusion. Well done!