You can analyze Marth play. Generally, PP does it really well.
Here is a video of PP talking about Marth vs Peach.
Here is a list of most recorded Marth vs Peach matches on YouTube. You can filter it by player too. Not only is it good to watch high level play, like Armada vs PP, but also watch good players wrecking bad players so you can see the bad options bad players choose and how the good player cover those options.
Here (20 minutes) is a good video of SleepyK talking about situational awareness and video analysis.
You can find good advice about the Peach match up on page 13 of
this Google Doc.