Let's face it, Squarenix has put a lot of great, and trout RPG's on the market over their history. With the sheer volume of games made, plus enimies created to fight, grind, and flat out kill, there is a great topic in there someplace. So that being said, what is your favorite enemy to fight, which one do you plug in to play and destroy that just makes you smile every time.
The he one for me that comes to mind first it the Golem Boss in Chrono Trigger. You fight him on the flying aircraft in 12,000 BC in Zeal Kingdom, the only issue is this guy is scared of heights and it adds a little comedy to the game. It's always been fun taking him out!