>>102846171. Your Pegasis looks like a knockoff. The F:D should look like pic related.
2. If you care about being competitive, you pretty much need to import Japanese beys or buy Pro series. Hasbro really botched things up with Burst.
3. No. You would need to swap the prongs to make them compatible. Since you're basically implying that you don't have a Burst launcher, you might as well just buy one, at that point.
4. Not that I know of, in terms of Burst.
5. One interesting thing about Burst is that the DB/BU beylaunchers are customizable. I've seen one Youtuber modify their beylauncher to fit mfb beys. You could probably do something like that.
