Well, likely Fantam from Breath of Fire IV.
Not only it looks ridiculous, but the boss is not even requiring any effort at all. Just make sure your entire party as full HP when you start this battle, and put the game in autoattack mode (all characters will then only do normal attacks until you break it off or until the battle is over) and make yourself some coffee. By the time you're drinking it, the battle has likely already been won.