A KING'S TALE: FINAL FANTASY XV

You won't have this by the time of completing the main story (unless you've died repeatedly) so don't fret over that. Instead, be happy that they've catered to such a trophy with one Dream Battle in Particular: #22, titled Flantastic. You'll want to clear this first while trying to go for the special challenge, "Complete the battle without the use of magic," so just bash on them until you can call Weskham in for the early rounds. Later in, your screen will be flooded with flan, so you can call in Clarus or Cid to help out too. If you do this a few times, you're guaranteed to get whatever number of enemies you still need with minimal effort.