The enemies are: Cream, two Red Panthers, an Antlion, and a Coeurl.
The panthers will really do a lot of damage, so if you can, take them down first, and maybe even use some status attacks to disable them or slow them down. Use Fire on the Cream and it will probably die with one hit because it's very weak to Fire elemental spells. But don't bother with physical attacks against it. It has a huge defense against physical attacks.
After the battle, Montblanc talks to you about the crazy monsters that have been appearing. One theory as to why they are appearing is that there are mysterious crystals hidden around the kingdom that have something to do with it.